Mtbf
[计] 平均无故障工作时间, 平均故障间隔时间
🗣️ 情景例句
That was very kind of you.
你真周到。
There's no sense in going by boat when the plane is just as cheap and much quicker.
既然乘飞机和坐船一样便宜而且还快得多，那么就没有理由去坐船。
Are there any birds in the picture?
画里面有鸟吗？