zinc

这种螺丝表面镀了一层锌以防生锈。

These screws are coated with ___zinc to prevent rusting.

这种金属中添加了一点锌来提高强度。

A small amount of ___zinc was added to this metal to enhance its strength.

菠菜和豆类含有丰富的锌元素。

Spinach and beans are good sources of ___zinc.