a small closed part that grows on a plant and from which a flower, leaf or stem develops; a flower or leaf that is not fully open 半开的花；未长大的叶 
Collocations The living worldTopics Plants and treesc1The living world 生物界 Animals 动物 - animals mate/breed/reproduce/feed (on something)
动物交配／繁育／繁殖／以…为食 - fish/amphibians swim/spawn (= lay eggs)
鱼／两栖动物游动／产卵 - birds fly/migrate/nest/sing
鸟飞翔／迁徙／筑巢／啼叫 - insects crawl/fly/bite/sting
昆虫爬／飞／咬／叮 - insects/bees/locusts swarm
昆虫／蜜蜂／蝗虫成群地飞来飞去 - bees collect/gather nectar/pollen
蜜蜂采蜜／花粉 - spiders spin/weave a web
蜘蛛结网／织网 - snakes/lizards shed their skins
蛇／蜥蜴蜕皮 - bears/hedgehogs/frogs hibernate
熊／刺猬／青蛙冬眠 - insect larvae grow/develop/pupate
昆虫的幼虫生长／发育／化蛹 - an egg/a chick/a larva hatches
卵孵化；小鸡出壳；幼虫孵出 - attract/find/choose a mate
吸引／找到／选择配偶 - produce/release eggs/sperm
产卵；排卵；产生／释放精子 - lay/fertilize/incubate/hatch eggs
产卵；使卵受精；孵卵 - inhabit a forest/a reef/the coast
栖居于森林／礁石／海岸 - mark/enter/defend (a) territory
标出／进入／保卫领地 - stalk/hunt/capture/catch/kill prey
悄悄接近／猎杀／捕获／杀死猎物
Plants and fungi 植物和真菌 - trees/plants grow/bloom/blossom/flower
树木／植物生长／开花 - a seed germinates/sprouts
种子发芽 - leaves/buds/roots/shoots appear/develop/form
叶子／花蕾／根茎／幼苗长出来／长大／成形 - flower buds swell/open
花蕾含苞欲放／绽放 - a fungus grows/spreads/colonizes something
菌类生长／扩散／长满… - pollinate/fertilize a flower/plant
给花／植物授粉 - produce/release/spread/disperse pollen/seeds/spores
长出／传播花粉／种子／孢子 - produce/bear fruit
结果 - develop/grow/form roots/shoots/leaves
长出根茎／嫩芽／叶子 - provide/supply/absorb/extract/release nutrients
提供／吸收／提取／释放营养物 - perform/increase/reduce photosynthesis
进行／增加／减少光合作用
Bacteria and viruses 细菌和病毒 - bacteria/microbes/viruses grow/spread/multiply
细菌／微生物／病毒生长／扩散／繁殖 - bacteria/microbes live/thrive in/on something
细菌／微生物在…中存活／大量生长 - bacteria/microbes/viruses evolve/colonize something/cause disease
细菌／微生物／病毒进化／长满…／引发疾病 - bacteria break something down/convert something (into something)
细菌（将某物）分解／转化（成某物） - a virus enters/invades something/the body
病毒进入／侵入某物／身体 - a virus mutates/evolves/replicates (itself)
病毒变异／演化／（自我）复制 - be infected with/contaminated with/exposed to a new strain of a virus/drug-resistant bacteria
感染上／接触到一种新病毒／抗药性细菌 - contain/carry/harbour bacteria/a virus
带有细菌／病毒 - kill/destroy/eliminate harmful/deadly bacteria
杀灭有害的／致命的细菌
Oxford Collocations Dictionaryadjective- flower
- leaf
- rose
- …
- appear
- burst
- open
- …
- in bud
- animals mate/breed/reproduce/feed (on something)
- (also buddy)(North American English, informal)
used to speak to a man you do not know （称呼不认识的男子）老兄，喂 see also cotton bud, rosebud, taste bud
Word Originnoun sense 1 late Middle English: of unknown origin. noun sense 2 mid19th cent.: abbreviation of buddy.
Idioms
nip something in the bud
to stop something when it has just begun because you can see that problems will come from it 将…扼杀在萌芽状态；防患于未然