Ecf
abbr. electrochemical fluorination-process 电化氟化法; extracellular fluid 细胞外液
🗣️ 情景例句
I was laid off.
我下岗了。
Change the subject.
说点别的吧！
of supplying sufficient details to enable the thing to be constructed.
而且向它提供制造核弹的细节，