Certificating
vt. 發給證明書（certificate的現在分詞形式）
??? 情景例句
or Mom is at a committee meeting.
就是媽媽參加小組會議。
These pills can be obtained by prescription only.
這些藥丸只有憑醫生處方才能買到。
Thanks. Let's put these books in the box.
謝謝，把這些書放到箱子里。