Pentad
n. 五, 五价物, 五天, 五年\\n[医] 五价物
🗣️ 情景例句
Robots can be used for many tasks which are considered too dangerous for people to do.
机器人能完成许多对人类来说是很危险的任务。
Drop dead
晕倒
In that case, we'd like cash on receipt of invoice.
这样的话，您在收到帐单时请付现。