例句： Definitions should not be more difficult to understand than the words they define.

例句： I feel depressed.

例句： He gave me a necklace as a token of his affection.

例句： The first-stage vehicle is used to launch the rocket and is then jettisoned in the upper atmosphere.

例句： Making your own beer? It's not worth the sweat!

例句： The others are a long way behind.

例句： A hot bath is a great refreshment after a day's work.

例句： Cats have sharp claws.

例句： He arrived in this country six years ago without a penny.

例句： class consciousness; race consciousness.