随着使用年限的增加，氯丁橡胶会逐渐粘稠和老化，救生服因而容易撕裂、破洞和开线——在寒冷的北方海域，这种小破绽无疑是致命的。
Neoprene stiffens and deteriorates as it ages, becoming prone to RIPS, holes and split seams-any of which can be fatal in frigid northern seas.
9月30日的地震发生于当地时间下午5点16分，距离南太平洋萨摩亚群岛海域的另一场致命地震不到24小时。
Yesterday's quake struck at 5.16pm, less than 24 hours after another deadly quake off the South Pacific island of Samoa.
澳大利亚海域有鲨鱼出没斯很平常的，但是鲨鱼攻击人类却很少见，不过致命的鲨鱼攻击却是周期性发生的。
Sharks are common in the waters around Australia. Attacks on humans are normally rare, but fatal attacks periodically occur.
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