gravitate: vi.1.受重力作用，受引力作用，自然被吸引。2.沉淀；沉降。3.倾向 (to; towards)。短语和例子If you all gravitate to one side, you'll upset the boat. 如果大家都移向一边，船就要翻了。 The population gravitates towards the town. 人口有集中都市的倾向。vt.使
downwards: adv.1.向下；以下，往下。2.趋向衰落，日趋没落，日益堕落。3.(年代等)以来，以后。短语和例子He lay face downwards on his bed. 他脸向下伏在床上。 look downwards 向下看。 As the river flows downwards, it widens. 这条河愈到下游愈宽。 be handed downwards fr
