1、This control hypothesis does not imply that debt issues will always have positive control effects.
這些關(guān)于控制的假說并不意味著，債務(wù)這件事并不總是有積極的控制效果。

2、Results The recovery rates of each positive control and diluent control were higher than 70%.
結(jié)果各試驗組陽性對照菌的回收率和稀釋劑對照組的回收率均達(dá)到70%以上。

3、Therefore, the positive control of obesity are extremely important issue in present and future.
因此，對于肥胖癥的積極防治，是目前以及未來都極為重要的課題。

positive control翻譯