求翻译：　　不过相较于校车的硬件设施，人员的软件设施也很重要。在美国，成为一个校车司机非常困难。首先，你得具有商用车驾驶证，然后才能参加校车专门的笔试和路试。通过之后将进入专门的地方进行无人校车演练，熟悉校车的一切相关流程和紧急救护知识，校方会认真监督这一过程并予以评价。而正式的校车司机得接受随机的酒精检查、药物检查乃至身体检查和生活背景考察，确保其生理上和心理上完全合格。校车司机属于政府部门，以上检查都是长期持续的，保证了司机技术和素质的稳定。是什么意思？

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　　But compares in the school bus hardware facility, personnel's software facility very is also important.In US, becomes a school bus driver to be extremely difficult.First, you must have the commercial vehicle driver license, then can participate in the school bus special written examination and the

　　But compared to the hardware facilities of the school bus, people soft infrastructure is also important. In the United States and became a school-bus drivers very difficult. First of all, you have to have a commercial vehicle driver's license before you can take part in the school car specifically