Following a small footpath, the visitor first sees a long concrete wall, 3m high, with a single opening.

通过一条小人行道，参观者可以看到一道长长的三米高混凝土墙，墙上只有一道开口。

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A single opening in this glass facade indicates the entrance and lets the light invade the reception.

一个开启的玻璃门表明这里是出入口，并且让光线撒入接待厅。

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Two structural forms can change under pressure to realize a water supply and drainage function of automatic quantify for a single opening.

两种结构形式均可依靠压力的变化，实现单口自动定量给排水功能。

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And,like birds they have a single opening with which they produce eggs, have sex and expel waste.

VOA: special.2009.07.07

The DNA molecule here has been spread apart, opening up two single stranded DNA's which have complementary base sequences because they were double stranded DNA.

这里DNA分子被分开,形成两条单链DNA,这两条单链碱基序列互补,因为它们是由双链DNA解旋形成的

耶鲁公开课 - 生物医学工程探索课程节选

Home fly-half Gareth Owen kicked two first-half penalties to rival Dan Parks' single opening period shot.

BBC: Ospreys 9-9 Glasgow Warriors

Elliott says that fact is exactly why the band chose it for their opening single.

BBC: Airship go with 'no brainer' Manchester label for debut

Practicing in short sessions across many days is more effective than "cramming" the same work into a single session, opening more avenues for recall.

WSJ: The Wrong Way to Practice Golf | Golf Journal by John Paul Newport