weak derivative

基本解释

The derivative has weak acidity and is stable in weak base solution.
該衍生物具有弱酸性，在弱堿中穩定。
The results indicate that the derivative 1and 2 have extraction abilities for mercury ion , however the extraction abilities for silver ion are weak.
結果表明，衍生物1、2 對汞離子具有一定的萃取傚果，而對銀離子萃取傚果較差，說明衍生物1、2 對銀、汞離子具有一定的選擇性萃取作用。
The blog has already written about weak economics for derivative projects in the Middle East. Could this be a reason for the hesitation on part of the two majors to quickly implement this project?
中東地區衍生項目經濟狀況薄弱，難道這是兩大巨頭猶豫不決以致不能盡快實施這個項目？