焚毁的英文：
burn down
destroy with fire

参考例句：

The building was burned to the ground.
该建筑已全部焚毁。

The whole building went up in flames.
整座建筑物在大火中焚毁.

The building was gutted by the fire.
那栋建筑物的内部被火焚毁。

The quick action of the firemen saved the building from being burned down.
消防队员行动及时，该建筑物方免遭焚毁。

burn是什么意思：
v. （使）燃烧；发热；灼伤
n. 烧伤；烙印

This is a brilliantly burning sphere.
这是个明亮燃烧着的星球。

Most pine snaps as it burns.
大多数松木燃烧时都发出噼啪声。

The wood in the fire snapped as it burned.
在火中木柴燃烧时劈啪啪地响。

down是什么意思：
prep. 在…下，沿着
v. 下降，打倒
n. 潦倒；羽绒；丘陵

Down with hegemonism!
打倒霸权主义！

The sun is down.
太阳下山了。

Close down autos and you close down steel and rubber.
关掉了汽车工业你也就关掉了钢铁工业和橡胶工业。

destroy是什么意思：
v. 破坏，摧毁；消灭，杀死

The town was destroyed by the earthquake.
整座城镇被地震毁灭了。

They decide to destroy the windmill.
他们决心摧毁风车。

To destroy or hinder the efficiency of; frustrate.
使不起作用使无效或限制其效力的发挥；阻挠、挫败