Racs
[医][=relative absorption cross section]相对吸收截面，相对吸收断面
🗣️ 情景例句
Follow the recipe properly or it will never come out right.
照着菜谱说的做，不然的话，味道就不对。
Can I fix an overseas call to London by person-to-person call?
我要打到伦敦的叫人电话好吗？
I've been working at a meat factory for about two months now.
大约两个月来，我一直在一家肉厂干活。