1.get back to 返回到
Let's get back to what we were saying before we were interrupted.
讓我們回到被打斷的話題上去。
2.stretches across 橫跨
Rain continued: From now on, when it rains, each of you will stretch across the sky in a great bow of color as a reminder that you can all live in peace.
雨接著說:從今以后,只要一下雨,你們每個都得伸展成大弓形橫跨在天際,藉以提醒大家和平共處。
3.collide with 與...相撞
A number have orbits that take them closer into the solar system that sometimes lead them to collide with Earth or the other inner planets.
有很多小行星的軌道可以把它們帶到太陽系的更內層,有時甚至會使它們與地球或其它內行星相撞。