[scode type="blue"]
infinitesimal
adj.极微小的;微不足道的[/scode]
音标：/ˌɪnfɪnɪ'tesɪm(ə)l/
英英释义：
Something that is infinitesimal is extremely small.
例句：
①Mineral substances present in infinitesimal amounts in the soil.
土壤含有的极微量的矿物质。
②There was an infinitesimal pause.
其中有一个极短暂的停顿。
《科学美国人》一篇题为 In every bit of nothing, there is something 也出现了这个表达：
[scode type="blue"]
pitch in
参与；协力[/scode]
英英释义：
If you pitch in, you join in and help with an activity.
例句：
①The agency says international relief agencies also have pitched in.
该机构说国际救援机构也提供了支援。
②Cartoonists have pitched in with their favourites from their own and other hands.
漫画家拿出了他们最喜爱的出自自己和他人之手的作品。
③The entire company pitched in to help.
公司上下都协力相助。
