Unefficient
无效的, 效率不高的
🗣️ 情景例句
And how old are you?
你几岁了？
It was a terrible experience,and I won't forget it.
它是可怕的经验，我不会忘记它。
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。