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。