His thoughts wandered off on another tack.

他离开了原来的思路。

《牛津词典》

He would just cut off lengths of canvas and tack them to the wall. When a picture was finished, he cropped off any remaining blank canvas.

每次创作时只能剪块帆布，钉在墙上，完成后还要把空白的画布裁下来，留着备用。

youdao

The invention could take high temperature compensate with chaff protruding tack to take normal on-off action under high temperature environment or large load.

与现有技术相比， 本发明利用托片凸钉进行高温补偿，使得光控器在高温环境或大负载的情况 下，仍能进行正常的开关动作；

youdao

He would just cut off lengths of canvas and tack them to the wall.

ECONOMIST: A French master reassessed

McNaughton is looking for something else, and spends the whole film not getting there: it sets off violently, tries a few jokes, changes tack to a mooching sadness, and finally settles for an old-style punch-up.

NEWYORKER: Mad Dog and Glory