The torn portion of the canvas had to be gently coaxed back to its flat state, otherwise it would return to the distortion left by the accident.
画布撕裂的部分要小心地恢复到平整的状态，否则它将会恢复到由于事故造成的扭曲的状态。
2
That is, the torn portion of the canvas had to be gently coaxed back to its flat state, otherwise it would have a tendency to return to the distortion left by the accident.
那意味着，画布撕裂的部分要小心地恢复到平整的状态，否则它将会慢慢回复到由于事故造成的扭曲的状态。
3
Here, interference from the hair has no effect on the skin-tight fit of the mask, which remains as flat as the painter's plane of canvas.