英语语法分析

The discussion method is time - consuming and tangental.

那种讨论方法既浪费时间又与正题脱节。

The inner tangental wall and radial wall are thickened, while outer tangental wall remain in thin wall state.

细胞的内切向壁及径向壁均加厚，而外切向壁保持薄壁状态。