easy to appear 容易出现
One ndfeb magnets chemical stability is poorer, in magnetic drum in humid air, easy appear on surface oxidation gradually layered peeling phenomenon.
其中钕铁硼磁钢化学稳定性较差,在磁滚筒内潮湿的空气中,易出现表面氧化逐步分层剥落的现象。
They appear to be okay, and they look good, and they're easy and cheaper for now, but when the storms move in, they crumble.
它们表面看起来还可以,而且现在看来十分方便和便宜,但是当暴风雨来临时,他们就崩溃了。
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