The air is of great use in helping things to burn.

空气可以帮助燃烧。

What are nails and horse-shoes made of? They are made of iron. Iron is of great use to us.

钉子和马掌是由什么制成的呢？是铁，铁对我们来说用途很大。

The air lies all round the earth on which we live, and it is of great use to us.

空气只在地球周围有一层, 空气对我们十分有用。

The cow is of great use to us. We like to drink her milk; and we make some of the milk into butter and cheese.

牛对我们的用处可大了！我们都喜欢喝牛奶, 还把一些牛奶做成黄油和奶酪。

Celia thought it was of great use, if not to say that, at least to take a journey to Lowick in order to influence Dorothea's mind.

西莉亚认为，就算不这么说，至少去洛维克一趟，影响多萝西娅的心智，也有很大用处。

By using our five senses we can distinguish one kind of matter from another, or tell the differences between them; and this knowledge is of great use to us.

凭借这五种感知能力, 我们就能够分辨不同的物质或者说出它们之间的差异；而这种知识对我们来说极为有用。

She had acquired a facility in the arrangement and expression of thoughts, in her avocation of translator, and compiler, which was no doubt of great use to her afterward.

她擅长整理和表达思想， 从事翻译和编纂工作， 这无疑对她日后大有裨益。

This form of writing, as he mentions in his Autobiography, became, “of great use to me in the course of my life, and was a principal means of my advancement.”

正如他在自传中提到的那样，这种写作形式“对我的一生大有裨益，是我进步的主要方式”。