Online shopping has always been a seasonal market and there are promising signs for the upcoming holiday season.

在线购物通常具有季节性，在即将到来的假日季节在线购物的前景不错。

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In many places, transmission is seasonal, with the peak during and just after the rainy season.

在许多地方，传播是季节性的，在雨季中或雨季结束不久，传播达到巅峰。

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Spring is a fantastic time for birding as many seasonal migrants return and nesting season begins.

春季是观鸟的绝佳时候，因为很多季节性的候鸟飞回来了，鸟儿营巢的季节也开始了。

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Several analysts said copper could fall some more in the next couple of months due to this uncertain backdrop, and also because of slower seasonal demand during the vacation season and maintenance shutdowns in the Northern Hemisphere.

FORBES: Copper Expected To Languish Over Summer But Pick Up Into Year-End

Will the lower flood-season flow affect the seasonal highs and lows of the water levels of the Great Lake in Cambodia?

ECONOMIST: Letters

As my colleague Morgan Brenan has explained, Hurricane Sandy was expected to take its toll on housing and construction, which could exacerbate seasonal slowness characteristic of the winter season.

FORBES: Watch Out With Housing: Disapointing Sales And Sandy Reveal Weak Recovery