A lot of proof - reading is put out to freelancers.校对工作有很多是请外人做的.We is replacing all our salaried staff with freelancers.我们正在将所有领薪金职员换成自由职业者.Do you have a written contract with your freelancers?你和自由职业者有书面协议 吗 ?...
A major barrier to interspecific hybridization is sterility in the F 1 progeny.种间杂交的主要障碍是F1代的不育性.It is also true, however, that hybridization effects are important.然而杂化效应是重要的, 这一点也是真实的.Somatic cell hybridization is techn...