绿标，就是机动车绿色环保标志，它实际上包含“黄标”和“绿标”。绿标又分国Ⅰ、国Ⅱ、国Ⅲ和国Ⅳ阶段。部分城市对达不到某种排放阶段的机动车实行禁止进入，而且很多城市都逐步设立限行区域，禁止达不到某种排放阶段的机动车进入。
更换年检、绿标、车险等标志时，仅需掀下标志而无需更换贴片。
Replace the inspection, the green label, auto insurance and other signs, just lift without changing the patch under the mark.
绿柱石、白钨矿和锡石色彩绚丽，其成分较为复杂，类质同象现象普遍，晶体形貌具有标型意义。
The major minerals like beryl, scheelite and cassiterite have relatively complicated chemical composition and remarkable isomorphism, which enables them to have typomorphic significance.
通过分析平面绿量效率这一指标，客观地说明了一些具有高叶面积指数、冠幅较大速生落叶大乔木应是遮荫树主体。
By analyzing the efficiency of LVV_H, it objectively illustrated that the tree with lager crown and higher LAI was the preference for shading.
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