可数。

If left unchecked， weeds will flourish.

如果不加遏制，杂草就会疯长。

Weeds grew through the cracks in the paving.

杂草从铺石路面的缝隙中长出来。

The garden's completely overgrown with weeds.

花园里长满了杂草。

Their garden is a wilderness of grass and weeds.

他们的花园杂草丛生。

The insecticide used on some weeds can cause health problems.

喷洒在野草上的杀虫剂会引发各种健康问题。