These doors are often opened during the daytime, making the entire floor a mobile playground where children can freely run around across the households.

为了腾出充足的空间让孩子们可以自由奔跑玩耍，这些滑动门在白天一般都是敞开的。

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Quick-opening closure is a common pressure-bearing component in pressure vessel. Quick-opening closure is often opened with pressure or boosted without closing the door resulting in kinds of accident.

快开端盖是压力容器中的一个常见的承压部件，快开端盖经常因带压开门或未关紧门升压导致各种事故。

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The first one, which aired last Thursday, opened, as the episodes often do, with his standup act.

NEWYORKER: Black and Blue

So begins Jonathan Tolins' utterly charming and often whacky one-man show that opened Wednesday at Rattlestick Playwrights Theater starring a superb Michael Urie.

WSJ: Michael Urie superb in charming 'Buyer & Cellar'

After nine years in Brazil, often working illegally for next to no pay, he has opened his own restaurant.

CNN: Booming Brazil lures immigrant workers