Improved environmental management can make it more difficult for disease vectors such as mosquitoes to survive and to breed.
改善环境管理可使蚊虫等疾病媒介生存和孳生更加困难。
To select the improved varieties of Tung trees is a main approach to prevent the breed from degenerating.
油桐选优去劣是防止品种退化、实现油桐良种化的主要途径。
To select the improved varieties of Tung trees is a main approach to prevent the breed from degenerating.
油桐选优去劣是防止品种退化、实现油桐良种化的主要途径。
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