South Africa has again re-introduced DDT for indoor residual spraying to keep malaria case and fatality Numbers at all-time low levels and move towards malaria elimination.
南非再次重新将滴滴涕用于室内残留喷洒，将疟疾病例和死亡人数保持在创记录的低水平并向着消灭疟疾前进。
By using thermal spraying technique for making moulds much time and money is saved.
采用热喷涂方法制造模具可以节省大量的时间和成本。
The spraying quantity, concentration of selenium, applying time and date of tea leaves picking after spraying were shown to be important factors for selenium enriched tea production.
硒施用量、喷施浓度、时间和茶叶采摘时期是通过叶面喷施亚硒酸钠生产富硒茶的关键因素。
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