向下的的用法和样例：
例句
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悬臂，支架伸在支点之外的一个构件，如一段横梁，由与其持平衡的或向下的在支点后面的一个力支撑
A member, such as a beam, that projects beyond a fulcrum and is supported by a balancing member or a downward force behind the fulcrum. -
倾斜向下的倾斜或斜坡
A downward inclination or slope. -
斜面，斜坡向下的斜面；倾斜面
A downward incline or passage; a slope. -
过顶扣球如网球或羽毛球比赛中的一击，伴随着从头顶猛烈向下的动作
A stroke in a game, such as tennis or badminton, that is made with a hard downward motion from above the head.
