目的观察针刺对分娩镇痛的临床效果及作用机制，寻找一种安全有效、简便可行的分娩镇痛方法。
Objective Observation of labor analgesia acupuncture and action mechanism of the clinical effect, looking for a safe and effective, simple and convenient method of labor analgesia.
为了让细胞“重编程”在细胞疗法中变得足够安全，科学家们必须寻找一种高效且可靠的办法来激活它。
For reprogramming to be safe enough to use in cell therapy, researchers must find an efficient, reliable way to trigger it.
在我们寻找用以取代化石燃料的可再生，安全并且廉价的能源的诸多努力中，利用阳光来将纯水还原成其组成元素的两种单质形态——氢气和氧气是其中大有希望的一种办法。
Using sunlight to split water into its components — hydrogen and oxygen — is one of the most promising methods for creating a sustainable, safe and cheap alternative to fossil fuels.
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