因此，最好每月检查一次胎压。
Therefore, it is best to check the tire pressure once a month.
安全通道，应急出口每月检查一次而不是每周检查。
The facility inspected aisles and emergency exit doors monthly instead of weekly.
每月检查一次皮肤有无变化或新的生长，有助于预防皮肤癌。
Check your skin once a month for changes or new growths to help guard against skin cancer.
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