As a rule of thumb, a cup of filter coffee contains about 80mg of caffeine.凭经验估计，一杯过滤咖啡约含80毫克咖啡因。As a rule of thumb , the minimum device feature is about 4 times the beam diameter.一般来说, 最小器件图形大约是电子束直径的4倍.A rule of thumb ...
The attackers were said to be taking revenge on the 14-year-old, claiming he was a school bully...据说，这些攻击者是在报复这个14岁的孩子，说他是学校的小霸王。Claiming a lack of opportunities is superficial excuse for justifying failure.声称缺少机遇只是是敷衍失败...