1.Bike helmet自行車頭盔;單車頭盔
It turns out he'd gone to the garage to get his bike helmet and found two helmets there.
原來他已經去了車庫取他的自行車頭盔,并且在那兒找到兩個頭盔 。
2.have a concussion 腦震蕩
I think I might have a concussion.
我想我可能有腦震蕩 。
3.black box黑匣子
At the highest level of abstraction, we can view the system as a single entity (complex whole), or black box.
在抽象的最高級別上,我們可以將系統視作一個單個實體(復雜整體),或黑盒 。