A：Make sure you screw the cap on the bottle of the mascara when you're done with it every time.
你每次用完后一定要拧紧睫毛膏瓶盖。
B：That's for sure. Or it'll dry off.
那是肯定的。否则它会变干的。
screw /skru?/ v. 旋紧；拧紧
◆ make sure 一定，务必，确定
◆ dry off 变干
擦掉瓶口的睫毛膏
wipe the mascara off the head of the bottle
A：Look at the bottle. Don't you think it's dirty?
看这个瓶子。你不觉得脏吗？
B：If the tissues weren't used up, I would have wiped the mascara off the head of the bottle with the tissues.
如果卫生纸没有用完，我就会用卫生纸擦掉瓶口的睫毛膏。
tissue /?t??u?; ?t?sju?/ n. 纸巾