glass作“玻璃”时,是不可数名词;作“玻璃杯、一玻璃杯的量”时,是可数名词;

glass的复数形式glasses有“眼镜”意,此时只用作复数。

例句：After two glasses of wine, I was feeling mellow.

两杯葡萄酒下肚，我就飘飘然了。

相关介绍

After four glasses of wine he began to feel light-headed.

他四杯酒下肚后开始感到头晕目眩起来。

Dark glasses screened his eyes from the sun.

他戴了一副墨镜，保护眼睛不受阳光照射。

The water was as smooth as glass.

水平如镜。

A glass of mineral water, please.

请给我来杯矿泉水。

The city is characterized by tall modern buildings in steel and glass.

这座城市的特点是钢铁和玻璃建造的现代化高楼大厦林立。