Pentavalency
五价
🗣️ 情景例句
I forgot the grocery list.
我忘了带我的购物请单。
The phone is ringing.
来电话了。
a ticklish business which is achieved with the aid of two tame elephants roped to the captive on either side.
这是一件棘手的事，需要在它两侧拴上两头驯服的大象才能完成。