此项研究，中途退出的比率很高，差不多有一半的参与者(59人)在研究完成之前离开，通常是因为副作用，或因为治疗对他们没有帮助。
The study had a high dropout rate, with almost half of the participants (59 people) leaving the study before it finished, often because of side effects or because the treatment wasn't helping them.
易变率度量着完成目标过程中波动的数量和比率。
Volatility measures the amount and rate of churn accomplish a goal.
如果増股顺利完成，汇丰的权益资本占一级资本的比率将从7%上升到8.5%。
Its ratio of equity to tier-one capital will rise from 7% to 8.5% if the rights issue is completed.
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