When applied to an extending stem, JA led to a significant increase in primary laticifer number, but induced no differentiation of secondary laticifers.

施用茉莉酸对正在伸长的茎中初生乳管分化有明显促进作用，但不能诱导形成次生乳管。

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Researchers studying a smoking ban in the western U. S. state of Colorado say a no smoking law in one city led to a 40 percent decrease in the number of residents hospitalized for heart attacks.

对美国西部科罗拉多州普韦布洛市一项禁烟活动进行研究的人员称， 在这个城市实行的禁烟法已经使得因为心脏病发作而住院的人减少了百分之40。

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