darkle

1.The sky darkled at the approaching storm.

风暴来临前天空渐渐了下来。

2.The night darkles rapidly.

地黑下来。

3.The precipice darkles in front.

山崖的前面是阴的。

4.If the silvered jewelry do not keep in a sealed environment or wipe it oftenly, it will caused the the color and luster become darkle.

银若未密封保存或经常擦拭，易使色泽。