downward force的用法和樣例:
例句
- 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.
懸臂,支架伸在支點之外的一個構件,如一段橫梁,由與其持平衡的或向下的在支點后面的一個力支撐
以上方式方式獨代構思,受著作權護理,抄襲必究
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