1．(2020·全国卷Ⅰ)The engineers at the Massachusetts Institute of Technology(MIT) have taken it a step further—changing the actual composition of plants in order to get them to perform diverse, even unusual functions. 履行，执行
2．(2019·浙江卷)Through the Internet, Zac tracked down Corrado's sister Adeline Rockko.追踪
3．(2017·浙江卷)Other European countries laid down a similar requirement for immigrants, and some terms are even tougher.严厉的；严格的
