...、共时的比较语言学证据可作为对历时研究的必要补充，以加强说服力，正因如此，索绪尔也将由古及今的正视法(prospective method)和借今溯古的回顾法(retrospective method)看作历史比较语言学两种不可缺一的方法。
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克服恐惧的唯一方法是正视恐惧。
在没有职业康健和法过去，良多公司对员工的康健和都不是很正视。
Before Occupational health and safety laws, most companies paid little attention to the health and safety of their staff.
方法：在实验室搭建实验装置，分别利用矩形光栅法的实验装置和平板法视网膜MTF测量仪器，来测定正视眼组和屈光不正组的不同空间频率条纹分辨的阈值，算出并分析比较所测MTF值。
METHODS: Retina MTF of two groups of people with emmetropia and ametropia were measured by means of a grating and parallel plate respectively. Then the measured MTF were compared and analyzed.
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