Certificating
vt. 发给证明书（certificate的现在分词形式）
🗣️ 情景例句
get some background on the job.
了解这项工程的一些背景。
The air conditioner is out of order.
这空调坏了。
Well, I'm afraid we have to go now.
哦，恐怕我们现在得走了。