请教一个含三个preferably的句子

ygft请教一个句子:It is preferred to apply and after-treat the TCO layer at a temperature above 250oC, preferably above 400oC, more preferably between 450oC and 600oC, so that a TCO layer of the desired composition an/or texture can be obtained by means of methods known in the field. apply 为涂敷。谢谢。

优选地，>250
较优地，>400
更加优选地，在450与600间

It is preferred to 优选的是，
preferably 优选
more preferably 更优选

ytyt谢谢各位