It is more difficult for a chronic smoker to give up the habit than for a novice, but it can be done.
句意：长期吸烟者比新手更难戒掉抽烟的习惯，但是也可以做到。chronic长期的；习惯性的。 constant经常的。wavering摇摆的。disciplined遵守纪律的。indecisive犹豫不决的。