攀爬之前要观察并判断所有已经固定在路线上面的装备是否状态良好，包括膨胀钉和挂片，尤其是保护站和难点上，这些地方上的钩环使用频率最高，磨损也最为严重。
Visually and manually inspect all fixed gear before using it, including bolts and anchors, and especially those at stations and cruxes where the carabiners see maximum wear.
freq_step 设置修改调控器在调整 CPU 频率时使用的频率步长（包括提高和降低两个方向）。
The freq_step setting changes the size of the frequency step the governor uses to change CPU frequency in either direction.
两位科学家共分析了1996年以来的9份研究报告，其中包括手机的种类，使用寿命及频率，甚至还有脑部肿瘤通常所在的位置等。
The review looked at nine studies since 1996 that included factors such as type of phone, duration and frequency of use and brain tumor location.
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