采挖

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1.

Coal is indeed a cheap source of energy , but its extraction is extremely costly to the environment.

煤炭其实是一种成本低廉的能源，但对它的采挖却耗资巨大。

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2.

By using the method , the excavation of the dendrobium officinale is reduced and the growth period of the dendrobium officinale is shortened .

采用该方法可以减少对铁皮石斛的采挖，缩短铁皮石斛的生长周期。

3.

Excavation of the standard length 25 cm, of which 18 ~ 20 cm was buried in the earth part, yellow, blue green partially excavated.

采挖标准长 25 厘米，其中 18~20 厘米是埋在土里的部分，呈黄色，出土部分为青绿色。

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4.

Outside Hong Kong , the species is under threats because of destruction of the habitats and over-collection by amateur horticulturists .

在香港以外地区，因生境破坏和经常被人采挖而受威胁。

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