英语语法分析

You will understand that he has been caught in the mid-dle.

你要了解，他被夹在中间， 左右为难。

The expansion and radial spread of cortex and pith cells are very strong after the mid-dle stage.

中期以后直至成熟，皮层和髓细胞强烈扩大、径向伸长。

Fsurfacing welding repair the parts of wear out face made by carbon steels, dle carbon steels low-alloy steels.

用于受磨损的碳钢、中碳钢、低合金钢机件边面堆焊、修复。