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. We owe a lot to the birds and beasts who eat insects but all of them put together kill only a fraction of the number destroyed by spiders.
    我们要十分感谢那些吃昆虫的鸟和兽，然而把它们所杀死的昆虫全部加在一起也只相当于蜘蛛所消灭的一小部分。

5. 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。

6. 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。

7. 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。

8. Only a small fraction of the creatures that die are preserved in this way before decay sets in or, even more likely, before scavengers eat them.
    死去的生物中也只有一小部分能在开始腐烂前，或更可能在被食腐动物吃掉之前，被这样保存下来。

9. 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"。

10. 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。