Crack, cold laps and lack of fusion belong to planar discontinuity.

属于这种类型的缺陷有裂纹、冷隔、末熔合等。

youdao

I stopped and ran laps around a parking lot, and it was remarkable how much being cold affected my coordination.

一次我停下来绕着停车场转了几圈，很明显寒冷对于我的影响有多大。

youdao

There simply isn't enough evidence to justify the benefits of swimming in freezing cold water over some laps in a warmer swimming pool.

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