他把一切不愉快的思想置于脑后。

He consigned all the unpleasant thoughts to oblivion.

youdao

忽视把…置于脑后；忽视。

To ignore deliberately or indulgently; disregard.

youdao

将双手置于脑后，以肘关节为圆心，顺时针做圆周运动，然后再逆时针转动。

Hands behind to elbow as the center, clockwise to do circular motion, then rotate counterclockwise.

youdao

使用方法：人体躺在器械上，用脚勾牢横杠，双手交叉置于脑后，利用腹部肌肉力量收缩坐起，缓慢还原，反复使用。

Use Method: lie down on the camber and hook the feet at a rung. put the hands behind the head. Use abdominal muscles to sit up and return to original position. Repeat the same movement.

youdao

使用方法：人体躺在器械上，用脚勾牢横杠，双手交叉置于脑后，利用腹部肌肉力量收缩坐起，缓慢还原，反复使用。

Use Method: lie down on the camber and hook the feet at a rung. put the hands behind the head. Use abdominal muscles to sit up and return to original position.

youdao

使用方法：人体躺在器械上，用脚勾牢横杠，双手交叉置于脑后，利用腹部肌肉力量收缩坐起，缓慢还原，反复使用。

Use Method: lie down on the camber and hook the feet at a rung. put the hands behind the head. Use abdominal muscles to sit up and return to original position.

youdao