Fhsas
(FHSA 的复数) 联邦危险物品法案（federal hazardous substances act）
🗣️ 情景例句
I'm on the top floor.
我在顶层。
That's right.
那是对的。
Once we detected a planet, we would have to find a way of blotting out the light from its star, so that we would be able to 'see' the planet properly and analyze its atmosphere.
一旦我们找到这样一颗行星，我们就要想办法将它的恒星射过来的光线遮暗，这样我们就能彻底“看见”这颗行星，并分析它的大气层。