Plifier
电子束半导体线性低通放大管
🗣️ 情景例句
But now ...
但是现在……
All of those houses have been built in the last ten years.
所有那些房子在这10年里被造的。
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。