Gravity segregation
[机] 重力偏析
🧩 词语组成解析
🗣️ 情景例句
If you have any trouble, let me know.
如果你有任何的麻烦，请告诉我。
How long does it take?
火车要开多久？
The operation, which lasted for over four hours, proved to be very difficult because of the hard resin which covered the skin.
手术持续了4个多小时，非常难做，因为皮肤上覆盖着一层硬硬的树脂。