1·However pure and sincere we may be, we all bear upon our candor the crack of the little, innocent lie.
无论我们是怎样诚挚、忠实、纯洁，在我们的良心上，大家总有一些小小的、不足为害的谎话的裂痕。
2·The crack on the diamond's surface is almost invisible.
这个钻石表面上的裂痕肉眼几乎看不出来。
3·A little crack detracts from the value of the vase.
小小的裂痕减损那个花瓶的价值。
4·Carbon fiber will not dent like metal but will crack which may lead to failure.
碳纤维产品不像金属产品会出现明显的裂痕，但是有可能导致其它更严重的后果。
5·SEM shows that the surface of the treated alloy is full of crack, and the figure of the particles are very irregular.
SEM表明改性处理后合金的表面存在很多的裂痕，形状很不规则。