Mathematical expectation
[计] 数学期望
🧩 词语组成解析
🗣️ 情景例句
Canada has the most beautiful waterfalls in the world.
加拿大有世界上最壮观的瀑布。
Please bring me those magazines.
请带给我那些杂志。
Rubbish, however, is only part of the problem of polluting our planet.
然而，垃圾只是我们这个星球的污染问题的一个方面。