Precipitates are usually collected by centrifugation at intervals.常常是用离心法分段收集沉淀的.Try to get into the habit of eating at least three small meals a day, at equally spaced intervals.尽量养成每天至少吃3顿小餐的习惯，而且每餐的间隔要相同。She began to ...
Researchers need a growing supply of corpses for dissection.研究人员需要更多的供解剖用的尸体。A dissection of your argument shows several inconsistencies.对你论点作仔细分析后发现一些前后矛盾之处.The coronary ostia are involved in the dissection.解剖时要牵动冠状动脉口....