at the base of和at thebottom of区别
foot和at the feet ① at the base意为“在底部；基础”。 There is a waterproof layer at the base of the building. 楼房的底部有防水层。 We camped at the base of the mountain. 我们在山麓宿营。 ② at the bottom意为“在底部，在下面”。 They found a sunken ship at the bottom of the lake. 他们在湖底发现一艘沉船...