不复杂的

It is true, we are such poor navigators that our thoughts, for the most part, stand off and on upon a harborless coast, are conversant only with the bights of the bays of poesy, or steer for the public ports of entry, and go into the dry docks of science, where they merely refit for this world, and no natural currents concur to individualize them.

这是真的，我们是一些可怜的航海家，我们的思想大体说来都有点虚无缥缈，在一个没有港口的海岸线上，顶多和有诗意的小港汊有些往还，不然就驶入公共的大港埠，驶进了科学这枯燥的码头上，在那里他们重新拆卸组装，以适应世俗，并没有一种潮流使它们同时保持其独立性。

Firstly, it introduces several concrete measures on how to use it properly. Then it adduces some teaching cases in order to illustrate better.

首先提出在中学课堂教学中正确应用多媒体技术的几项具体措施，然后进行了教学案例研究。