cotyledon

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英 { "us": "", "uk": "" }
数据源: ai_enrichment
子叶是植物种子发芽时最先长出的叶片,储存养分供幼苗生长,常见于豆类等双子叶植物。

用法要点

句型搭配

通常用作可数名词,在句子中作主语或宾语,描述植物结构或发育过程。

• The cotyledon emerges first.
• Plants have one or two cotyledons.

介词用法

常与介词'of'连用表示所属关系,或与'in'表示在特定植物中的存在。

• cotyledon of a bean
• cotyledons in dicots

语域说明

主要用于植物学、农业等学术或专业语境,日常对话中较少使用,除非讨论园艺或生物学。

• botanical term cotyledon
• agricultural research on cotyledons

基础例句

When the bean sprouted, its cotyledon pushed through the soil.

豆子发芽时,它的子叶破土而出。

The cotyledon provides food for the young plant until it can photosynthesize.

子叶为幼苗提供养分,直到它能进行光合作用。

In my garden, I noticed the cotyledons of the sunflower seeds turning green.

在我的花园里,我注意到向日葵种子的子叶变绿了。

高级例句

The study analyzed cotyledon morphology in dicotyledonous plants to understand evolutionary adaptations.

这项研究分析了双子叶植物的子叶形态,以理解进化适应。

Agricultural reports indicate that cotyledon health is crucial for early crop establishment and yield.

农业报告指出,子叶健康对作物早期建植和产量至关重要。

In botanical research, cotyledon development is often used as a marker for seed germination success.

在植物学研究中,子叶发育常被用作种子萌发成功的标志。

高频搭配

verb

developemergeabsorbstorewither

adjective

firstgreenthicknutritiousembryonic

noun

seedplantleafembryonutrient

adverb

initiallyrapidlytypicallygradually

preposition

ofinfromduring

phrase

cotyledon stagecotyledon developmentcotyledon functioncotyledon structure

常见错误

❌ 错误:The cotyledon is the root of the plant.
✓ 正确:The cotyledon is the first leaf of the plant.

错误地将子叶误认为根;子叶是种子发芽时最先长出的叶片,不是根部结构,应准确描述其叶状功能。

❌ 错误:All plants have two cotyledons.
✓ 正确:Monocots have one cotyledon, while dicots have two.

错误地认为所有植物都有两个子叶;实际上,单子叶植物有一个子叶,双子叶植物有两个,需根据植物类型区分。

近义词辨析

seed leaf

seed leaf 是 cotyledon 的通俗说法,更口语化,但含义相同,都指子叶;cotyledon 更正式,常用于学术语境。

In casual talk, gardeners might say 'seed leaf,' but botanists prefer 'cotyledon.'

embryonic leaf

embryonic leaf 强调子叶作为胚胎部分的结构,而 cotyledon 更泛指子叶的整体功能和发育阶段;前者更侧重胚胎学角度。

The embryonic leaf develops into the cotyledon during germination.