being effective without wasting time or effort or expense;

"an efficient production manager"
"efficient engines save gas"
able to accomplish a purpose; functioning effectively;

"people who will do nothing unless they get something out of it for themselves are often highly effective persons..."
"effective personnel"
"an efficient secretary"
"the efficient cause of the revolution"

This is a highly efficient new heating system.
这是个高效的新取暖系统。

Consequently, we have been developing a more efficient engine.
结果,我们已经开发了一台更高性能的发动机。

The success of CAD systems is becoming more dependent on the efficient drafting.
cad系统的成功在很大程度上取决于草图的制图效率。

He's efficient at his job.
他胜任工作。

I'll say this for them--I'll admit that they're efficient.
我得为他们说句话——我会说他们很有能力。

The appeal to sentiment was heartlessly efficient; it had struck him in the place where he was most vulnerable and at the hour when he was most alone.

出自： G. Greene

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