1
by an order of magnitude
用于强调差异巨大，常修饰比较级。
The new system is faster by an order of magnitude.
新系统快了一个数量级。
数量级；量级
orders of magnitude — plural of order of magnitude
先理解核心含义，再看它在真实句子里的用法。
数量级；量级
a level or degree of size or importance, usually one of a series in which each level is about ten times greater or smaller than the previous one
The new system is faster by an order of magnitude.
新系统快了一个数量级。
任何数量的量级类别,其中每个类别包含与前一类固定比率(通常为10)的值。
The class of scale or magnitude of any amount, where each class contains values of a fixed ratio (most often 10) to the class preceding it.
The new server is about an order of magnitude faster than the old one.
新服务器比旧服务器快大约一个数量级。
A minor change in the process can improve output by orders of magnitude.
流程中的一个小改动可以让产量提高几个数量级。
We need to reduce this error by an order of magnitude.
我们需要将这个误差减少一个数量级。
用于强调差异巨大，常修饰比较级。
The new system is faster by an order of magnitude.
新系统快了一个数量级。
This error is an order of magnitude larger than expected.
这个错误比预期的大了一个数量级。
复数形式表示多个数量级。
These numbers differ by several orders of magnitude.
这些数字相差几个数量级。
表示大致接近，不要求精确。
The estimate is within an order of magnitude of the true value.
估算值在真实值的一个数量级之内。
Not this
These two values differ by an order magnitude.
Use this
These two values differ by an order of magnitude.
错误：遗漏了介词 'of'。'order of magnitude' 是固定短语，直译中文“数量级”时容易漏掉介词。正确形式必须保留 'of'。
Not this
The earthquake was several orders of magnitudes stronger.
Use this
The earthquake was several orders of magnitude stronger.
错误：复数形式错误。'order of magnitude' 中 head noun 是 'order'，复数应为 'orders of magnitude'，'magnitude' 作为介词宾语保持单数。
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Dictionary facts from ECDICT, WIKTIONARY.