existence condition的用法和樣例：
例句
- Add a rule to use the data connection when a condition on the form exists.
添加當表單上存在條件時使用數據連接的規則。 - The existence conditions of helical equilibrium are discussed as a special configuration of the rod.
作為特殊的平衡狀態，討論桿的螺旋線平衡的存在條件。 - The ship is in no condition to make a long voyage.
此船的現狀不適宜遠航。 - He is not fatuously content with existing conditions.
他不會愚昧地滿於現狀的。
