That expression has been sanctioned by usage.

那种表达方式在惯用法上已被认可。

youdao

NOTE: As you go through this tutor, do not try to memorize, learn by usage.

注：浏览本教程时，不要试着去记，而是学习其用法。

youdao

In this example, preset models are used by selecting Specify characteristics by usage type, as shown in Figure 25.

在这个例子中，通过选择Specify characteristics by usage type使用预先设定的模型，如图25所示。

youdao

The farmers themselves pay to keep it running. Their new irrigation method has cut water usage by half.

VOA: standard.2009.12.10

Sooner or later, he says, operators will have to introduce more stringent usage caps, demand a premium for better service or charge by usage.

ECONOMIST: Saturated mobile networks

Customers with smart thermostats reduced their usage by 27%, and customers with gateway systems, which adjust the electricity use of multiple appliances, reduced their usage by 43% during the peak hours.

FORBES: What Would You Pay To Stay Cool?

Interestingly, as the mobile data usage soared by 68%, the voice minute usage of iPhone owners dropped by 13% over the same 10 month span.

FORBES: As iPhone Mobile Data Usage Soars, Voice Calls Dive