浪费时间是不良习惯.

Wasting time is bad habit.

你们必须去掉过去的不良习惯.

You must shuck off the bad habits of the past.

戒掉不良习惯！

As for bad habits: just quit!

他染上了不良习惯.

He has fallen into bad habits.

结论：青少年儿童口腔不良习惯、错（牙合）与TMD之间相互影响；

Conclusions: The interaction among oral bad habit, malocclusion and TMD is significant.

目的调查儿童喂养方式 、 吮奶瓶时间及其他一些口腔不良习惯对儿童牙颌发育的影响.

Objective To investigate effects of feeding style, sucking time and bad habit on dentognathic development.

这一发现，即视觉刺激只提供有关不良习惯有效性的信息，但没有确定的行为，以获得它可以帮助开发新的更有效的治疗方法。

The finding, that the visual cues offer only information about availability of the bad habit but do not determine the behaviour to get it could help to develop new more effective treatments.

大学的集体生涯让我收获不少，不但辅助我改掉了一些不良习惯，而且让我学会了相互懂得与包容。

University of collective life I gain a lot, not only to help me get rid of some bad habits, but I learned mutual understanding and tolerance.

一项最新研究结果让人警醒：吸烟、酗酒、缺乏运动和饮食不合理等四个不良习惯加在一起，会让你看上去老12岁。

Four common bad habits combined — smoking, drinking too much, inactivity and poor diet — can age you by 12 years, sobering new research suggests.

伙伴不好者很容易养成不良习惯.

Those who keep bad company can easily fall into undesirable habits.