Simply sand them down with a fine grade of sandpaper.
只要用细砂纸把它们打磨一下即可。
Cohorts were broken down by year and grade.
队列按年份和等级细分。
Unfortunately, those two grades brought down my G. P. A. (Grade-point Average)
不幸的是，其他两科的成绩把我的平均积点给拉了下来。
Now bear down on it like the seventh grade noogies we all know too well.
现在像我们熟知的第七级敲击力量用力敲它。
Now bear down on it like the seventh grade noogies we all know too well.
现在像我们熟知的第七级敲击力量用力敲它。
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