Desernil
马来酸二甲麦角新碱
🗣️ 情景例句
What does John do?
John现在做什么事？
It's a small world.
这世界真小。
Our knowledge of the oceans a hundred years ago was confined to the two-dimensional shape of the sea surface and the hazards of navigation presented by the irregularities in depth of the shallow water close to the land.
100年前，我们只知道海洋是二维平面形的，以及靠近陆地浅水区的深浅不一能给航行带来危险。