大海呈天青石色。

The sea was of a lapis lazuli blue.

《新英汉大辞典》

而天青石当时非常贵，而且难弄到。

Lapis Lazuli was very expensive and hard to get.

youdao

每年冬天青蛙都会冬眠。

Frogs hibernate during the winter every year.

youdao

雨过天青即是自由处。

The rain is free.

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认为本矿床应届沉积——改造类型的天青石矿床。

Therefore, the author considers the deposit to be a sedimentary-transform type of celestine.

youdao

认为本矿床应届沉积——改造类型的天青石矿床。

Therefore, the author considers the deposit to be a sedimentary-transform type of celestine.

youdao