Serfs
n. 农奴, 奴隶( serf的复数形式 ); 像农奴般遭受奴役的人
🗣️ 情景例句
Sorry, Richard. They don't have it.
对不起 Richard 他们那里没有。
What would you have done last night if you hadn't had to study?
如果昨晚你不必学习你会做什么？
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。