While the use of bed nets has long been encouraged by WHO, the recent development of "long-lasting insecticidal nets" (LLINs) has dramatically improved their usefulness.
虽然世卫组织长期以来鼓励使用蚊帐，但是最近开发的“长效杀虫蚊帐”已显著提高其有效性。
2
Plastic mulch increases soil temperature in the bed which promotes faster crop development and earlier yields.
塑料薄膜覆盖提高苗床的土壤温度，促进作物较快发育并提早成熟。
3
Royal Dutch Shell's move on Arrow Energy is an important step forward in the company's development of Australia's coal bed methane.