传统的高压钠灯配备的是电感式镇流器，其体积大，本身功耗大、功率因数低、调光困难等。

Traditional ballast components of inductance ballast has some disadvantages which include large volume, high self consumption, low power factor and difficult to adjust.

youdao

同样，海底地质认为，如果硫化物矿床是巨大的，并不需要其体积大，只需其不定型和其金属含量高。

Similarly, in the world of seabed geology, if a sulphide deposit is massive, it is not necessarily big, but formless and rich in metals.

youdao

而且由于其体积大，鲜有天敌，鲸鱼和其它大型海洋脊椎动物可以有效地吸收海水表层的碳，将其输出到深海。

And because of their size and few predators, whales and other big Marine vertebrates can efficiently export carbon from the surface waters to the deep sea.

youdao