In this way, they cannot only increase their knowledge but also keep up with the time.
这样，他们不但能增加知识而且也能赶上时代。
They can keep contact with others any time at any place as long as they put up the phone.
只要打开电话，他们可以在任何地方随时与他人联系。
Itll be some time before supply can keep up with the increasing demand.
随着需求的不断增长，一段时间以后供应也会上升。
Itll be some time before supply can keep up with the increasing demand.
随着需求的不断增长，一段时间以后供应也会上升。
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