Backscattered
反(背)向散射的
🗣️ 情景例句
Michelle is very grown up for a ten-year-old, huh?
以一个十岁的孩子来说 Michelle很成熟 ，是吗？
This is not an occasion for laguhter.
现在不是该笑的时候。
I don't know. I've got a headache and a cough.
我不知道。我头痛和咳嗽。