1. But even when both parties have signed such an agreement, it can be impossible to enforce it in court if proper guidelines have not been followed.
    但是，即使双方签署了这样的协议，如果不遵循正确的指导方针，还是不可能在法院实施它。

2. We are looking for a proper exporter.
    我们在寻找合适的出口商。

3. We should situate a thinker and his thought in their proper place.
    我们应当给一位思想家及其思想以合适的地位。

4. Workmen put in a proper drainage system and supplied pure drinking water.
    工人安装了合适的排水装置，提供纯净的饮用水。

5. The serious investor needs a proper ´portfolio´----a well-planned selection of investments, with a definite structure and a clear aim.
    认真的投资者需要一份正规的投资组合表 -- 一种计划很周密的投资选择，包括你的投资结构和明确的目标。

6. This is what the police say happened beginning at 3:20 AM in the proper, tree-lined neighborhood:
    以下是警方的描述：惨案始于凌晨3：20，案发地点是树木环绕的高级住宅区。

7. Now that I am older, I believe that is a proper standard by which to judge people, even though I still don't know precisely what a "good heart" is.
    现在我长大成人了，我开始相信这正是判断一个人的恰如其分的标准，虽然我还没有确切理解什么是"好心"。

8. Have the proper tools to turn off gas and water lines if necessary.
    有必要的话，准备一些能关闭煤气和自来水管道的特制工具。

9. As we´ve not got the proper materials, we´ll just have to improvise.
    我们没有弄到合适的材料, 只好临时凑合了.

10. Another crucial factor is the need for parents to have proper conversations with their children.
    另一关键因素是父母应该与孩子进行适当的交谈。