这种染料含有氰基，使其具有独特的蓝色。

This dye contains a ___cyano group, giving it a unique blue color.

蓝藻突然大量繁殖，使湖面变成了鲜绿色。

The sudden bloom of ___cyano turned the lake surface bright green.

这种青色颜料非常适合绘制天空。

This ___cyano pigment is perfect for painting the sky.