Frontlines
n. 前线（frontline的复数形式）
🗣️ 情景例句
Richard, isn't that too much to ask of your mother?
Richard，那是不是太麻烦你母亲啦？
It's time to begin.
到开始的时候了。
I had traced the cause of the trouble.
因为我找到了毛病所在。