plastic bottle是不可数的。
例句：
Plastic bottle and sand or gravel.
塑料瓶，沙子和小石子。
Should be kept in a sealed plastic bottle.
应在密闭的塑料瓶内保存。
扩展资料
You need to press-off the solution from the plastic bottle.
你得用力把塑料瓶中的`溶液挤出来。
I think the dog retrieved the plastic bottle 100 times!
我认为狗取回了塑料的瓶子100次！
You can use a large plastic bottle whose top was cut off.
你可以使用一个瓶颈被砍掉的大塑料瓶。
