Our supplier confirmed that the battery contains lithium, a light element in high demand.

我們的供應商確認這款電池含有鋰，一種需求量很高的輕元素。

The safety report lists every chemical element used in the factory's cleaning products.

安全報告列出了工廠清潔產品中使用的每一種化學元素。

During the plant tour, the engineer explained how each element is tested for purity.

參觀工廠時，工程師說明了每種元素如何進行純度檢測。