这些2009年五月引进Bing所作的准备，将迎来六个月周期性的升级。
The upgrades have come in six-month cycles since the preparations for Bing’s introduction in May 2009.
在12月份下旬，一直受周期性欧洲经济危机影响而波动的美元重回低位。
In late December, the dollar resumed a decline that has been interrupted only by periodic European crises.
从12月份开始就一直在那里，慢慢的在StCroix和StThomas之间交叉往来65公里，周期性的浮出水面再潜回4000米的深处。
It has been there since December, slowly criss-crossing the 65km between St Croix and St Thomas, periodically surfacing and then diving back down again to depths of 4, 000 metres.
婴儿的行为和成长情况分别在第一个月，第四个月等的时候进行周期性记录，直到两岁。
Babies' behavior and development was tested at 1 month old, 4 months and periodically until they were about 2.
五月六号的事件或许是个例外，但是市场的周期性波动却是不争的事实。
The events of May 6th may have been exceptional but a period of market volatility is not.
五月六号的事件或许是个例外，但是市场的周期性波动却是不争的事实。
The events of May 6th may have been exceptional but a period of market volatility is not.
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