perforations怎么读，perforations什么意思，perforations短语和例句

1.Manglietia species all have scalariform perforation plates, only a few also have simple perforations.

木莲属的所有种中都有具梯状穿孔板的导管分子，但在少数种中偶然可见到单穿孔。

2.Squeeze cementing USES pressure to force the cement through holes or perforations in the casing.

挤水泥时在压力下将水泥浆压经套管中的射孔孔眼。

3.The perforations of this skin, arranged according to the orientations bring a pleasant subdued lighting.

表面的穿孔，通过安排调整方向以带来舒适柔和的光照。

4.The characteristics and placement of the communication paths (perforations) can have significant influence on the productivity of the well.

连通通道(射孔孔眼)的特性和位置会对井的产能产生重大影响。

5.Close inspection shows that they are wearing masks with tiny perforations around the eye and nose area for seeing and breathing.

据近距离观察，原来他们戴了面具，眼部和鼻子附近有许多方便观看和呼吸的小孔。

6.The perforations have a relatively large diameter and the perforation tunnel is deep.

射孔孔眼具有相对较大的直径，而且射孔孔道很深。

7.There were seven colonic perforations in the OC group and none in the CTC group.

在OC组中有7例结肠穿孔，而在CTC组中结肠穿孔无1例出现。

8.Recent studies have suggested that growth factors may be an effective non surgical alternative for treating chronic TM perforations.

近来的研究表明生长因子是门诊治疗慢性鼓膜穿孔一种有效的方式。