Mould the mixture into shape while hot, before it hardens.

在混合物变硬之前，趁热将其塑造成形。

《柯林斯英汉双解大词典》

When it hardens, the tartar will need to be removed by your dental professional.

当硬化的牙垢将需要您的牙科专业删除。

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If plaque isn't removed promptly with proper oral hygiene, it hardens into tartar.

如果噬菌斑因为没有良好的口腔卫生而留在牙齿中，它将会升入牙垢当中。

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The mineral content of clay also affects the temperature level at which it hardens.

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Wherever the light hits the material, it hardens into a polymer, creating a grid of cells full of liquid crystal.

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As the fat cools it hardens and deposits gradually build up.

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