bit error amount
误码量
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The amount of trial and error required for most of the challenges is a bit extreme, and it will definitely try your patience.
大多数挑战所设计的不断失败再重试的确极端了一些，并且将直接考验你的耐性。
youdao
It will take a bit of trial and error to find the right amount of additional calories to build muscle and stay lean.
CNN: How should I eat to build muscle mass?
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