Trees normally cost four times less on average, but are usually turned into mulch or sent to garbage dumps after the holidays in most North American cities.
圣诞树的价格一般为树木均价的四分之一，但在大多北美城市，人们过完圣诞后通常会将圣诞树做成腐叶土，或干脆丢弃。
Usually I go in the early evening, especially in the summer and fall, when the air in Washington is warm and still and the leaves on the trees barely rustle.
通常，我在傍晚进去，特别是在夏天和秋天，那时华府的空气温暖，而且寂静，树上的树叶几乎不会发出瑟瑟声。
A tool with a bladed usually heavy head mounted crosswise on a handle used for felling trees or chopping wood.
斧一种带刀片的工具，一般重的一头十字交叉地安置在一个把手上，经常用来伐树或砍木头。
I usually only use layers to quickly turn off and on large group items to test out different scenarios or to temporarily turn off poly heavy objects such as trees while I model.
我通常只使用图层来快速打开和关闭大组件项目，以测试不同的场景或暂时关闭面多的项目，比如模型中的树木。
The primary biomass used for surfactant production usually is as follows: cellulose, lignin, starch, chitin, oil and fat and pine oleoresin(an exudate of pine trees) and so on.
开发表面活性剂的生物质资源有纤维素、木质素、淀粉、甲壳素、油脂和松脂等。
The primary biomass used for surfactant production usually is as follows: cellulose, lignin, starch, chitin, oil and fat and pine oleoresin(an exudate of pine trees) and so on.
开发表面活性剂的生物质资源有纤维素、木质素、淀粉、甲壳素、油脂和松脂等。
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