1. therapeutic adj. 治疗(学)的；疗法的

The therapeutic application of warmth and moisture, as to relieve pain.
温暖、湿润的治疗药品，用作减轻疼痛。

2. Students holding the hot pads were twice as likely as those with the cold ones to react to others in a positive way.
在倾向于对他人作出正面反应的人数中，手持热垫的学生大约是持冷垫学生的两倍。

在这里“sth. be twice as...”表示“……是……”的两倍。关于倍数的表达方法还有

A is n times as great(long, much, ...)as B.

A is n times greater (longer, more, ...)than B.

A is n times the size (length, amount, ...) of B.

以上三句都应译为；A的大小（长度，数量，……）是B的n倍[或A比B大（长，多，……）n-1倍].

e.g. This book is three times as long as (three times longer than/three times the length of) that one.
这本书的篇幅是那本书的3倍（即长两倍）。

注：当相比的对象B很明显时，than（as，of）B常被省去。