Stiffeners
n. 加强剂（stiffener的复数）
🗣️ 情景例句
I am sorry. I am not free right now.
对不起，我现在很忙。
I felt it advisable to do nothing.
我认为最好什么也别做。
The men were now obliged to try once more.
工人们只得再来一次。