In January the penny post was established, covering the whole country: in its first year it would double the volume of letters written.

一月，遍布伦敦的邮局建成了，第一年的书信量就翻了一番。

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In order to reduce energy consumption in greenhouse, the underground heat storage system with double-film covering was designed based on the plant physiology.

针对温室加温能耗大的突出问题，设计了双层覆盖温室地下蓄热系统。

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The best is double plastic membrane cover, although more expensive than plastic covering layer higher, but the heat preservation effect is good.

最好是覆盖双层塑膜，虽然成本比单层塑膜覆盖高些，但保温效果较好。

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The Transport Committee (at 10.05am) has a double-headed session covering road safety, with junior Transport Minister Mike Penning and then moves onto flight time limitations - the acceptable hours for pilots and aircrew.

BBC: Week ahead in Parliament

Kuroda's eighth inning ended with a snappy double play started by shortstop Jayson Nix, who ranged far to his left to scoop up Nate McLouth's grounder up the middle and flipped to Robinson Cano covering the bag for a 6-4-3 double play.

WSJ: Kuroda's 5-hitter leads Yankees over Orioles 3-0