During the development period, horticulturists experimented extensively with a number of factors, including cultivation methods and harvest times.

在研发期间，园艺家广泛多种参数，包括栽培方法和收获时间。

Madam, as any horticulturist will tell you, one does not plant petunias until May is out.

- 女士，任何园艺家都会告您，五月之前不能种植矮牵牛。

This British horticulturalist actually thought about evolution first, as Dr Mike Weale, geneticist at King's College London, explains.

正如伦敦国王学院遗传学家 Mike Weale 博士所解样，这位英国园艺家实际上首先想到进化。

And with the help of Sam Kass, as well as the White House horticulturalist and a crew of enthusiastic fifth graders from a local elementary school, Michelle planted her garden.

在 Sam Kass、白宫园艺家和当地一所小学热情五年级学生帮助下，Michelle 种植她花园。