英语标点符号用法Seenfromthemoon,outearthwaterwithcoveringseventypercentofitssurface,appearsasablueball.这句谓语动词不是appears怎么前面用了逗号呢?主语时earth.怎么主谓用符号分开了呢?

Question

英语标点符号用法
Seen from the moon ,out earth water with covering seventy percent of its surface,appears as a blue ball.
这句谓语动词不是appears 怎么前面用了逗号呢?主语时earth .怎么主谓用符号分开了呢?

Answer 1

我认为你那句话可能有误,这句话应该这么说：Seen from the moon ,our earth ,with water covering seventy percent of its surface,appears as a blue ball.
这里的逗号相当于汉语里的破折号或小括号,用于解释说明某一事物.