They must be straight as viewed from behind.

他们必须从后面观察，笔直。

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Each refers to the orientation of the cylinders as viewed from the front or back of the engine.

每一种方式是指气缸从内燃机的前面或后面看上去的方位。

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The transmission characteristics of microwave digital system is analyzed as Viewed from evaluation.

本文从估量的角度入手，分析数字微波的传输特性。

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Kingsley was fascinated by how the story explores mental health care from half-a-century ago when techniques now viewed as barbaric were commonplace.

VOA: standard.2010.02.27

The spacecraft will maintain the longest continuous image record of the Earth's surface as viewed from space.

BBC: Lift-off for latest Landsat mission

But if the planet's orbit is nearly edge-on, as viewed from Earth, then the planet will transit its parent star.

ECONOMIST: Transits of Venus

As David Rubin of the University of California, Berkeley, lead author on the study, told the AAS meeting, "for a sense of brightness, this supernova is about as bright as a firefly viewed from 3, 000 miles away".

BBC: Supernova 'Mingus' could shed light on dark energy