Tetrasomy
四体性
🗣️ 情景例句
when Susan and Richard were babies?
当Richard和Susan还很小时？
The evils we bring on ourselves are the hardest to bear.
自作孽不可活。
I think you probably know China has adopted a flexible policy in her foreign trade.
我想你也许已经了解到中国在对外贸易中采取了灵活的政策。