经过多年试验研制而成的绿色高科技产品。

After years of test developed by green high-tech products.

youdao

经过多年试验，研究者已在治疗黑色素瘤，肺癌和血癌方面取得进展。

After decades of trying, researchers have made progress against melanoma, lung cancer and leukaemia.

youdao

经过多年试验表明，采取对插穗进行催芽处理等一系列育苗技术措施，可使新疆杨硬枝扦插成活率提高到80%-95%。

After many-year experiments, the result show that bud forcing treatment can increase the survival ratio of Populus bolleana with cuttage by hard branch up to 80%-95%.

youdao