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1·One's ears are more attuned to sounds in the darker hours – the very occasional shriek of a shearwater, the other sounds with no known cause.

在黑暗中，人的耳朵会对声音更敏感——偶尔有海鸥发出尖利的叫声，还有各种来路不明的声音。

2·An occasional short ride is unlikely to cause trouble.

偶尔一次短途骑车不大可能造成麻烦。

3·It can also be linked to the ship's radar, for greater accuracy, though the fact that the laser does not cause permanent damage means that occasional mis-targeting will not matter too much.

虽然激光不会造成永久性伤害的因素意味着偶发性误瞄准的情况问题不大，但激光发射器同样可以与船载雷达连接以确保精确性。

4·The ones with smooth tops are the ones that have rolled over: some of these cause tsunamis powerful enough to wash the occasional unwary Danish tourist off the beach and away to an icy death.

顶部平滑的那些冰块就是已经翻转过了的：有些碎冰能引发强有力的海啸，把不经常来的丹麦旅游者从岸上卷入海中，这些旅行者往往把不知警惕，这就造成了冰发死亡事件。

5·Perhaps in your Reddit conversations you run into the occasional user who always seems to cause trouble.

也许在Reddit对话中，您还会遇到那些偶然到访的用户，而这些用户往往会制造很多麻烦。

6·A mild case of dust mite allergy may cause an occasional runny nose, watery eyes and sneezing.

轻度的螨虫过敏可能只是偶尔的流鼻涕，流眼泪，打喷嚏。

7·In an occasional woman, having too much stress can change her hormone levels and therefore cause the time when she releases an egg to become delayed or not take place at all.

女性偶然压力太大会使激素水平变化，导致排卵时间延迟或不排卵。

8·A few occasional flaps of the wings of a butterfly in a South American tropical rain forest in the Amazon Basin may cause a tornado in Texas, the United States two weeks later.

亚马孙盆地的南美热带雨林中的一只蝴蝶，偶尔扇动了几下翅膀，两周后在美国得克萨斯州可能引起一场龙卷风。

9·True knot and torsion of cord are cause by occasional factors and difficult to prevent.

脐带异常中脐带真结节、扭转均属偶然因素，难以预防。

10·The occasional loneliness, already could not cause my attention, now the human has grown up, many must think, the multi-considerations, only then may move.

偶尔的寂寞，已经引不起我的注意力，现在人长大了，很多都得多想想，多考虑，才可以行动。