hill, mountain

hill指小山或丘陵，而mountain则指高大的山岳、山脉。此外mountain的坡要比hill陡，且山顶多由岩石构成。

The car went up the hill in first gear.汽车以一档的速度爬坡。

Everest is the highest mountain in the world.珠穆朗玛峰是世界上最高的山峰。