to hold your nerve;to keep your nerve：保持镇定 to lose your nerve：惊慌失措；失去勇气；变得胆怯 ..
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to keep your nerve
保持你的勇气
以上为机器翻译结果，长、整句建议使用 人工翻译 。
And it has Vitamin B-12 -- you need this to keep your nerve cells healthy.
CNN: Red meat linked to higher metabolic syndrome risk
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