英语语法分析

Plantings of cotton bioengineered to produce its own insecticide against bollworms, a major cause of crop failure, sustained little bollworm damage until this year.

经过生物工程改造的棉花种植场可以生产自己的抗棉铃虫杀虫剂，而棉铃虫是造成农作物歉收的主要原因，直到今年，棉铃虫的危害都很小。

Now, scientists have demonstrated ready-to-use, bioengineered blood vessels made from human cells.

现在，科学家们已经演示了即用型、由人体细胞制成的生物工程血管。

This work represents the first report of a bioengineered version of CD19-L, a recombinant human biotherapeutic agent, targeting CD19-positive leukemic stem cells.

本研究工作为CD19-L的生物工程版本（一种重组的人类生物治疗因子，其靶标为CD19阳性白血病干细胞）的首篇报告。