He had learned to present a blank, neutral surface.
他学会了在外表上显得呆头呆脑，庸庸碌碌。
This plane is therefore called the neutral surface of the beam.
因此这个平面称为梁的中性面。
MIGRATION OF THE NEUTRAL SURFACE IN SINGLE BEDDED ROCK UNDER THE BUCKLE FOLDING
纵弯褶皱作用下岩层内中和面迁移问题的探讨
Scrub each optical surface with a gauze pad soaked in an enzymatic, neutral pH cleaner.
用含酶得中性得清洗液得网垫擦净光学表面。
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