* A rocket must attain a speed of about five miles per second so that it may put a satellite in orbit.

火箭必须获得大约5英里每秒的速度以便把卫星送入轨道。（that引导目的状语从句）

(2) that还可以与now和in连用，即now that与in that，引导原因状语从句，译为“由于”，“既然”。如：

* Phosphorus has an undesirable effect on steel in that it imparts brittleness.

磷对钢有不良的影响，因为它会使钢变脆。（in that引导原因状语从句）

* Now that we have a working knowledge of dynamics, it becomes possible to quantify the model for a gas.

由于我们已经掌握了指导性的动力学知识，我们可以用数量来表示气体模型了。(now that引导原因状语从句）

* Now that they have electronic computers, mathematicians are solving problems they would not have dared tackle a few years ago.

由于有了电子计算机，数学家们现在正在解决几年之前还不敢着手解决的问趣。(now that引导原因状语从句）

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