Example sentences

1. 朝勉強した方が効率がいいらしい。朝の１時間は夜の３時間にあたいするそうだ。

   I hear that studying in the morning is more effective. Studying one hour in the morning is as good as three hours at night.

2. どのクーラー一番効率がよいと思いますか。

   Which air conditioner do you think is the most efficient?

3. このやり方は、カロリーを得がたい環境ではエネルギー効率がよい。

   This behavior is energy-efficient in an environment where calories can be hard to come by.