大多数香烟都有过滤嘴，以减少吸入的焦油量。

Most cigarettes have a ___filter to reduce the amount of ___tar inhaled.

焦油是吸烟时产生的有害物质之一。

___Tar is one of the harmful substances produced when smoking.

工人们正在用焦油修补屋顶的裂缝以防止漏水。

The workers are using ___tar to fix the roof cracks and prevent leaks.

工人们正在用柏油覆盖屋顶以防漏水。

The workers are ___tarring the roof to prevent leaks.