Earth前面一定加the吗

问题描述

精选答案

当earth是表示地球的话，作为世界上独一无二的物体，在前面要加定冠词the的；onearth,downtoearth是词组，有它自己的意思，第一个是究竟，第二个是在地球上。

扩展资料It was once thought that the sun travelled around the earth.人们曾经认为太阳绕着地球转。The earth takes a year to orbit the sun.地球绕太阳一周要一年的时间。What on earth is the effect of the multimedia teaching 多媒体教学的效果究竟如何？Arrows would continue to fly forward forever in a straight line were it not for gravity, which brings them down to earth.要不是重力使箭落向地面，它们将永远以直线往前飞行。