Aval
[经] 保兑
🗣️ 情景例句
I'm listening.
那就说吧。
Is the production line fully attomatic?
生产线是全自动的吗？
and at the most critical juncture we took turns in watching that point.
在最紧急的时刻，我们轮流监视那段河流的险情。