But exercising vigorously only once a week or less increases your risk of an injury, he said.
他还说，但是一个星期只锻炼一次甚至更少就会增大受伤的危险。
But in Korea, the only computers are older PCs, and they remain in the computer lab, which is used only once a week for computer class.
然而在韩国，唯一的电脑是老式的PC机，而且它们都放在计算机房里，只在一周一次的计算机课上才能用。
Some students prefer to study for very long time but only once during a week. Others prefer to study for several short times during a week.
一些学生喜欢每周学习一次但是持续时间很长，另一些学生喜欢每周利用零散的时间学习很多次。
The gratitude journal was brief — just one sentence for each of the five things — and done only once a week, but after two months there were significant effects.
感恩日记可以很短小，一句话代表一件事就行，频率也不用很高，一周一次就可以，但两个月后就会有非常明显的效果。
People only shower about once a week during the winter, but they wash their feet every night before going to bed.
天天晚上洗脚，冬天一周洗一次澡。（除黄种人之外，好像老外个个有狐臭喔！）
Only work an hour or two a day. Don't check email but once a week.
一天工作一到两个小时，一周查一次电子邮件。
I only use this once per week, could probably use it more, but tend to use when my facial skin begins to look a little dull.
我只每周用一次，也可能次数多一些，但是只在我脸部肌肤看起来比较暗沉的时候用。
I only use this once per week, could probably use it more, but tend to use when my facial skin begins to look a little dull.
我只每周用一次，也可能次数多一些，但是只在我脸部肌肤看起来比较暗沉的时候用。
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