一般使用的燃煤是大分子机关的碳链，煤质剖判仪器焚烧时效率较低，经过我们增加的酵素降解〈Chop down〉处分此后，它裂解燃煤环烃无机长链，我不知道副作用。使大分子机关碳链变成低碳链机关，从而有效进步燃煤的焚烧效率。
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PHRASAL VERB If you chop down a tree, you cut through its trunk with an axe so that it falls to the ground. 砍倒
Sometimes they have to chop down a tree for firewood.
有时他们不得不砍倒一棵树来做木柴。
Sometimes they have to chop down a tree for firewood.
有时他们不得不砍倒一棵树来做木柴。
I'm going to chop down this cherry tree; it has almost stopped producing fruit.
我打算把这棵樱桃树砍掉，它已经不结什么果子了。
Once a lumberjack was about to chop down a tree, when he noticed a heart carved on it, with two names inside.
从前，有个伐木工人正要砍倒一棵树时，注意到上面刻了一颗心，中间有两个名字。
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