近几年公司美国的利润一直运转良好，但它是个周期性现象，而周期正在转向。
Corporate America's profits have had a good run in recent years, but they are cyclical phenomena and the cycle is turning.
名牌商品集团必须分成辨出，此轮市场萧条多大程度上是周期性现象，多大程度上反映了消费者行为的永久性改变。
Branded-goods groups must decide how much of the slump is cyclical and how much reflects a permanent change in consumer behavior.
气候变化及周期性的厄尔尼诺现象引起的海水变暖，已经造成了大面积的珊瑚礁在所谓的“漂白”事件中消失殆尽。
Warmer sea temperatures caused by climate change and periodic El Nio events have caused large areas of coral to be wiped out in so-called "bleaching" events.
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