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。
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。
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