A1 noun 中性

lichen

/ˈlaɪ.kən/

Lichen is a small, slow-growing organism that looks like a flat, crusty plant. It usually grows on rocks, tree trunks, and walls and is actually a mix of algae and fungi living together.

例句

3 / 5
1

The old stone wall is covered in green and orange lichen.

The old stone wall is covered in green and orange lichen.

2

The historical committee noted that lichen is damaging the ancient marble statues.

The historical committee noted that lichen is damaging the ancient marble statues.

3

Wow, this tree is almost completely hidden by thick lichen!

Wow, this tree is almost completely hidden by thick lichen!

词族

名词
lichen
形容词
lichenous
相关
lichenology
💡

记忆技巧

Think of 'Alice Algae' and 'Freddie Fungus' taking a 'likin' (lichen) to each other and living together on a rock.

快速测验

The hikers noticed colorful ______ growing on the surface of the mountain rocks.

正确!

正确答案是: lichen

例句

1

The old stone wall is covered in green and orange lichen.

everyday

The old stone wall is covered in green and orange lichen.

2

The historical committee noted that lichen is damaging the ancient marble statues.

formal

The historical committee noted that lichen is damaging the ancient marble statues.

3

Wow, this tree is almost completely hidden by thick lichen!

informal

Wow, this tree is almost completely hidden by thick lichen!

4

Lichen species are frequently used by scientists to monitor atmospheric pollution levels.

academic

Lichen species are frequently used by scientists to monitor atmospheric pollution levels.

5

Our exterior cleaning service specializes in removing lichen from office building facades.

business

Our exterior cleaning service specializes in removing lichen from office building facades.

词族

名词
lichen
形容词
lichenous
相关
lichenology

常见搭配

crusty lichen crusty lichen
lichen-covered rock lichen-covered rock
orange lichen orange lichen
grow lichen grow lichen
lichen diversity lichen diversity

常用短语

lichen crust

lichen crust

foliose lichen

foliose lichen

lichen growth

lichen growth

容易混淆的词

lichen vs moss

Moss is a simple green plant with tiny leaves, whereas lichen is a combination of fungus and algae.

lichen vs lycan

A lycan is a fictional werewolf, sounding similar to the pronunciation 'li-ken'.

📝

使用说明

Lichen is usually treated as an uncountable mass noun when referring to the growth generally, but can be countable when referring to specific biological species.

⚠️

常见错误

Learners often mistake lichen for moss; remember that lichen is usually flatter, crustier, and can be many colors like orange or grey.

💡

记忆技巧

Think of 'Alice Algae' and 'Freddie Fungus' taking a 'likin' (lichen) to each other and living together on a rock.

📖

词源

Derived from the Greek word 'leikhen', which referred to a plant-like growth or skin disease.

语法模式

Uncountable noun (mostly) Can be used as a compound noun: lichen species Commonly follows the pattern: 'covered in lichen'
🌍

文化背景

Lichens have been used for centuries in some cultures as a source of natural dyes for wool and clothing.

快速测验

The hikers noticed colorful ______ growing on the surface of the mountain rocks.

正确!

正确答案是: lichen

更多nature词汇

rainforest

A1

A thick forest in a tropical area that receives a large amount of rain throughout the year. It is a dense habitat known for having many different types of plants and animals.

tundra

A1

A large, flat area of land in very cold parts of the world, such as the Arctic. In this area, the ground is frozen and there are no trees, only small plants like moss.

wetland

A1

A wetland is an area of land that is always wet or covered with shallow water. It is a very important place where many different plants and animals, like birds and frogs, live.

coral reef

A1

A coral reef is a large underwater structure made from the skeletons of small sea animals called corals. They are usually found in warm, shallow parts of the ocean and provide a home for many types of fish.

vegetation

A1

Vegetation refers to all the plants and trees that grow in a particular area. It is used to describe the green cover of the earth, like forests or grass.

foliage

A1

Foliage refers to the leaves of a plant or tree, considered as a group. It is often used to describe the overall appearance and mass of greenery in a landscape or forest.

canopy

A1

A canopy is a cover that hangs over something, like a bed or a seat, to provide shade or protection. In nature, it is the top layer of a forest where the branches and leaves of tall trees meet to form a roof.

photosynthesis

A1

Photosynthesis is the natural process that green plants use to make their own food. They use sunlight, water, and carbon dioxide to create energy and release oxygen into the air.

pollination

A1

Pollination is the process of moving pollen from one flower to another to help plants make seeds and fruit. This is usually done by insects like bees or by the wind.

seedling

A1

A seedling is a very young plant that has just started to grow from a seed. It usually has a small green stem and its first few tiny leaves.

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