In the last few months, at least three commercial flights, two on American Airlines and one on Air Canada, have experienced severe turbulence that resulted in injuries to those on board.

近几个月以来，至少有三架民航飞机遭遇到严重乱流，导致机上人员受伤；其中有两架美国航空、一架加拿大航空班机。

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Those Twitter Cards that started rolling out over the last few months are also getting a big push, with plans to include other ways for developers to bring their rich content to Twitter, and embed real-time Twitter content on existing websites.

ENGADGET: Twitter's API v1.1 rules put user caps on third party clients, exert more control overall

And when more than a few of those helium sources are shut down for maintenance and repair, as they have been over the last few months, helium shortages can occur.

CNN: U.S. needs a strategy on helium

In this municipality, no less than 42 families have come back in the last few months - 20% of the those that left.

BBC: Heading back across the border