You must on no condition tell them what happened.
你决不能告诉他们所发生的事。
Special conditions apply if you are under 18.
18岁以下者按特殊情况处理。
These are the terms and conditions of your employment.
这些是聘用你的条件。
Day by day his condition improved.
他的健康状况一天天好转。
Patients can become conditioned to particular forms of treatment.
病人会习惯某些治疗方式。