Mtbs
abbr. mean time between services 维修平均间隔时间，平均无维修工作时间; mean time between stops 停机平均间隔时间
🗣️ 情景例句
2, 3, 4, front. Now we're going to run it off. 2 3 4
前踢。现在， 我们来快跑。
Grain by grain and hen fills her belly.
一粒一粒啄米，母鸡填饱肚皮。
shape in only two dimensions.
形态只有两种尺度。