separation and purification and breeding of microbial species should be operated at proper time ;
无菌条件。 2。适时地进行菌种的分离纯化及选育。
after the specified coating is applied, the paint film of the damaged parts shall be prepared at proper time and way.
在运用指定油漆后,损坏部分的漆膜在合适的时间及方法进行处理。
the results show that the system can irrigate at proper time and adequate quantity, and effectively fulfills water-saving irrigation.
实际运行表明,该系统能根据土壤水分适时、适量灌溉,有效地实现了节水灌溉。
so we should choose proper programs at proper time for people in different ages.
所以我们应该按照不同的年龄,在合适的时间选取合适的节目看。
operational conditions: conduct leveling at proper time according to site temperature and humidity condition.
作业条件:根据现场温度、湿度条件掌握适当时机进行自流平施工。