under: 短语和例子under the law 根据法律。 under age 未成年。 under sb.'s hand and seal 经某人签名盖章。 under arms 武装着，手执武器。 under avow 发过誓，在誓言下。 under favour 如果允许(这样说)的话〔多作插入句〕。 under fire 在弹雨下，冒着炮火 (land under fire
Example Sentences:
1.
Stability analysis of penstock under external pressure based on ga - nn algorithms 基于遗传神经算法的压力钢管外压稳定性分析
2.
Series analysis showed that the critical buckling pressure of cylinder under external pressure could be obviously decreased with the increase of ellipticity of cylinders 系列计算表明，外压圆筒体屈曲临界压力值会随筒体椭圆度的增加而明显降低。
