Backknee
[医] 膝反屈
🗣️ 情景例句
On a contract.
在一份合同上面。
Don't teach your grandmother to suck eggs.
休要班门弄斧。
Once he had done this, he had been able to turn on the supply.
一旦他接上了接头，他就能够打开供气阀。