第一次，很偶然，那是TACT创建者罗伯特·罗斯的大女儿。
The first, as it happens, was with the eldest daughter of Robert Ross, the founder of TACT.
这样的模仿差点给我惹了麻烦。有一次很偶然地，教授叫我回答问题。
This mimicry almost got me into trouble, when, on a rare occasion, the professor called on me to answer a question.
传统观念一直认为只有长时间服用毒品才会破坏脑部官能，而这次的研究结果显示，很偶然的服用一次也有可能使脑神经受到永久性伤害。
We've long known that repeated use damages serotonin brain cells. This study shows that even very occasional use can have long-lasting effects on many different brain systems.
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