自制自动浇水装置:in the possession 与 in possession的用法？

in the possession 与 in possession的用法？ Mary is a boy of a girl 与in possession of与in the possession of 的意思 Taking possession of the 70%’s the spring for safety belt market share in china in space与 in the space区别 in front of与in the front of 的区别 ？in the hospitai 与 in hospital 的区别？？ in future与in the future 的区别？ in front of与in the front of 的区别 请问at the bottom与in the bottom的区别 under the sun 与in the sun有什麼区别呢？