For a sunspot to form on the solar surface, the magnetic field needs to attain a certain strength to push the surface plasma aside, exposing the solar interior as a cool spot — a sunspot.

在太阳表面，磁场强度必须强到能推开表面的等离子体，将温度较低太阳内部的暴露在外，形成一个太阳黑子。

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The lines on her face bespoke repression and even a certain strength.

脸上的皱纹显示出她内心的压抑，甚至透露着些许坚强。

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She was young, with a fair, calm face, whose lines bespoke repressions and even a certain strength.

她还年轻，五官端正，脸色平静，从面部轮廓可以看出种种压抑，甚至还有某种坚强。

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It's - a suture or a stitch has to hold the wound closed so it has to have certain mechanical strength and imagine the problem of making something that's dissolvable so it disappears but also is strong enough to hold a wound closed reliably for a length of time.

能够拉紧切口的缝合线,就必须具有一定的机械张力,大家想像一下制造这种缝合线的难度,身体组织不仅要能吸收这种缝合线,而且这种线必须有足够的张力,一定时间内能够拉紧切口

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It has a certain strength, in a brute force kind of way, but it is hypersensitive, over-reactive, and needs to be re-envisioned.

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Like the outcasts many no doubt were in high school, high-power rocketeers seem to derive a certain inner strength from the persecution they endure, nowadays at the hands of the Federal Aviation Administration, the Bureau of Alcohol, Tobacco and Firearms and other killjoy agencies looking to rain on their exploding parade.

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However, since 2007, dietary supplement manufacturers are required to follow certain guidelines to ensure they're pure, have a consistent strength and are manufactured appropriately.

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