Ectomesoderm
外中胚层
🗣️ 情景例句
A murder occurred last night in this very district.
就在这个区昨晚发生了一起凶杀案。
The hour's delay was most annoying.
这时候耽误是最令人烦恼的。
Given more attention, the trees could have grown better.
如果悉心照料，树会长的更好。