Scientists say an experimental vaccine reduced the risk of infection in human beings by thirty-one percent and was safe.
VOA: special.2009.10.13
For example, one of the experiments we do is measure the magnetic field of current coil, and after we do the experiment, we all have a passive visualization that shows the same experimental set-up, except we add to that.
比如,我们做的一个实验就是,测量电线圈的磁场,在我们做完实验之后,我们都感受到了一个直观化的过程,它展现了同样的实验过程,只是那是我们加的。
Scientists say an experimental vaccine reduced the risk of infection in humans by thirty-one percent and was safe.
VOA: special.2009.09.30
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