1
pollen + singular verb
作名词时，pollen 是不可数名词，谓语动词用单数。
Pollen is carried by the wind.
花粉随风传播。
花粉
先理解核心含义，再看它在真实句子里的用法。
花粉
the fine spores that contain male gametes and are produced by the anther of a flowering plant
Pollen is carried by the wind.
花粉随风传播。
花中产生的细颗粒状物质。
A fine, granular substance produced in flowers.
含有雄性配子的细小孢子,由开花植物的花药携带
the fine spores that contain male gametes and that are borne by an anther in a flowering plant
开花植物花药中产生的花粉粒(小孢子)。
Pollen grains (microspores) produced in the anthers of flowering plants.
The car outside is covered in a fine layer of yellow pollen.
外面的车覆盖着一层薄薄的黄色花粉。
Bees carry pollen from one flower to another as they collect nectar.
蜜蜂在采集花蜜时，把花粉从一朵花带到另一朵花。
The botanist studied the pollens of several native grasses under a microscope.
那位植物学家在显微镜下研究了当地几种原生草本植物的花粉。
作名词时，pollen 是不可数名词，谓语动词用单数。
Pollen is carried by the wind.
花粉随风传播。
指多种不同种类的花粉时，可用复数形式 pollens。
Different pollens can trigger allergies.
不同的花粉会引发过敏。
作及物动词时，pollen 后直接跟宾语，意为“给……传授花粉”。
Bees pollen flowers while collecting nectar.
蜜蜂在采蜜时给花传授花粉。
Not this
I am allergic with pollen.
Use this
I am allergic to pollen.
“allergic” 后接介词 “to”，表示“对……过敏”，而不是用 “with”。这是受汉语“对……过敏”中“对”的干扰。
Not this
There are many pollens in the air in spring.
Use this
There is a lot of pollen in the air in spring.
pollen 是不可数名词，没有复数形式，谓语动词用单数；表示“许多花粉”用 “a lot of/much pollen”，不能说 “many pollens”。
Not this
I saw a pollen under the microscope.
Use this
I saw a pollen grain under the microscope.
pollen 不可数，前面不能直接加不定冠词 “a”；要说“一粒花粉”需用 “a pollen grain” 或 “a grain of pollen”。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
花粉计数
The pollen count is high today, so my allergies are acting up.
今天花粉计数很高，我的过敏又犯了。
花粉过敏
Her pollen allergy gets worse in spring.
她的花粉过敏在春天更严重。
花粉季节
During pollen season, many people sneeze constantly.
在花粉季节，许多人不停地打喷嚏。
花粉粒
Under a microscope, pollen grains look different for each plant species.
在显微镜下，不同植物种类的花粉粒看起来不一样。
蜂花粉
Some people add bee pollen to smoothies for extra nutrients.
有些人把蜂花粉加入奶昔以增加营养。
花粉管
The pollen tube grows down the style to deliver sperm cells to the ovule.
花粉管沿花柱生长，将精子细胞输送到胚珠。
Use pollen naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
pollen 里有 poll（投票）：春天花粉太多，让过敏的人想投票取消它。
语域：neutral 常见场景：botany、allergy season、general conversation 作为名词表示“花粉”时，通常用于日常交流、科普文章和医疗讨论中，是比较常见的中性用词。较不常见的动词用法“传授花粉给”多限于专业植物学语境，日常很少使用。
通常为不可数名词；复数形式 pollens 指不同种类的花粉。
Dictionary facts from ECDICT, WIKTIONARY.