Weedless
a. 无杂草的
🗣️ 情景例句
but, unfortunately,
但是， 很不幸，
I tried to call you, but the line was busy.
我试着给你打电话，但老占线。
It was from the study of these that so much was learnt about the interior of the earth.
正是从这两种波的研究中，我们可以了解到地球内部的许多情况。