找出适宜于离子束诱变育种的初筛方法，是必要而且是必须的。
It is necessary and indispensable for us to find out an optimal screening method.
酶抑制法具有检测时间短、成本低、操作简便等特点，是目前我国控制农药残留的一种有效的初筛方法。
The enzyme inhibition method only needs short time, low cost, simple operation, and it becomes an effective initial method for controlling pesticide residues in China nowadays.
以代谢控制理论为指导，确定以选育亮氨酸营养缺陷型菌株作为初筛方法，选育低产杂醇油啤酒酵母突变菌株。
Under the instruction of metabolic control theory, the screening of leucine auxotroph was determined as the method of selecting the mutant strain of low-yield fusel oil.
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