舍本逐末的英文：
[Literal Meaning]
abandon/root/seek/branch
to attend to trifles and neglect the essentials

[解释]
抛弃根本的、主要的，而去追求次要的。

[Explanation]
to pay attention to nonessentials

[例子]
导师对他的研究生说：“我们不能舍本逐末，一定要把研究的重点放在汉语语法上。”

[Example]
The supervisor said to his graduate students,

pound foolish;Grasp the shadow instead of the essence;penny wise
舍本逐末