duck/dʌk/发短音，dark/dɑːk/发长音。
The main course was roast duck.
主菜是烤鸭。
She chose a bench beside the duck pond and sat down.
她选了鸭池旁的一张长椅坐了下来。
Her eyes gleamed in the dark.
她的眼睛在黑暗中闪烁。
We should arrive before dark.
我们天黑以前应该能赶到。
One dark brow rose in surprise.
一道乌黑的眉毛惊奇地挑起。
duck，发音ʌ，短促。
dark，发音ɑː，口腔张大内圆。
