栽培者必须准备使用一系列的化学药剂.Growers must be prepared to use a range of chemicals.栽培者就再也不能完全控制营养状况.The grower is no longer in full control of the nutritional situation.用专利品来表示使用剂量对栽培者来说最有意义.Doses presented in terms of the proprieta...
I took my first extra-mural course in 1948 in Coventry, even though I was working in Birmingham...1948年我在考文垂第一次上校外课，虽然当时我在伯明翰工作。Adult education is run in cooperation with the extra-mural departments of the universities.成...