It's advisable to remove the nettles when the water goes slightly green, otherwise the tea can become too bitter.
不过最好在茶水变得稍绿时将叶片取出，否则这杯茶会很苦的。
The colour is light straw with slightly green tinges.
颜色是明亮的稻草色且带有些许绿色。
The color of clinker is changed from the original ash gray into dark gray (slightly green is caused by serpentine containing magnesium salt).
熟料颜色由原来灰白色变为暗灰色（稍有绿色是蛇纹石含镁盐造成的）。
The color of clinker is changed from the original ash gray into dark gray (slightly green is caused by serpentine containing magnesium salt).
熟料颜色由原来灰白色变为暗灰色（稍有绿色是蛇纹石含镁盐造成的）。
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