Marijuana use among college students is on the rise in the United States.
美国大学生之中吸食大麻呈上升趋势。
Studies of American college students show that daily marijuana use was more popular than cigarette smoking for the first time last year.
针对美国大学生的研究表明，去年，日常吸食大麻首次比吸烟更受欢迎。
Studies found that 5.9 percent of college students said they use marijuana nearly every day. Students claimed to have smoked at least 20 times in the prior 30 days. That is a 3.5 percent increase from 2007, and the highest rate since 1980.
研究发现，5.9%的大学生表示他们几乎每天吸食大麻。学生们声称他们在最近30天内至少已经吸食过20次。这比2007年提高了3.5%，也是1980年以来的最高水平。
Only five percent of college students reported using tobacco daily.
只有5%的大学生报告称每天吸烟。
More students are experimenting with the drug for the first time, as well.
还有更多学生首次体验吸食大麻。
Twenty-one percent of students reported having used marijuana once or more in the prior 30 days. That is a 4 percent increase from 2006. Thirty-four percent of those questioned said they used marijuana in the prior year, four percent more than in 2006. However, the levels appear to have leveled off since 2014.
21%的学生声称在最近30天内吸食过一次或多次大麻。这比2006年提高了4%。34%的被调查者表示他们在最近一年吸食过大麻，比2006年高出4%。然而，自2014年以来吸食水平似乎已经趋于平稳。
The University of Michigan's Monitoring the Future study reported the findings. Lloyd Johnston was the lead researcher. He said, "It's clear that for the past seven or eight years there has been an increase in marijuana use among the nation's college students. And this largely parallels an increase we have been seeing among high school seniors."
密歇根大学“监督未来”研究发表了这一研究结果。劳埃德·约翰斯顿（Lloyd Johnston）是这项研究的首席研究员。他说，“很明显，在过去七八年间，美国大学生中吸食大麻的人数在不断增加。我们可以看到高三学生吸食大麻的人数也在同步增加。”
Less Dangerous Than Tobacco
危险性低于烟草
Mr. Johnston said the main driver for the increased use of marijuana is the belief that it is not as dangerous as tobacco. He pointed to studies of high school graduates between the ages of 19 and 22. In 2006, 55 percent of those questioned said regular use of marijuana was dangerous. Eight years later, that number dropped to 35 percent.
约翰斯顿先生表示，造成吸食大麻人数增加的主要推动力是人们认为它不像烟草一样危险。他提到了针对年龄在19到22岁之间的高中毕业生的研究。在2006年，55%的被调查者表示经常吸食大麻很危险。8年之后，这一数字下降到了35%。
He said this is probably a result of increased legalization of medical and recreational marijuana use. It is legal to use marijuana for recreational purposes in four U.S. states and three U.S. cities. Twelve other states have legalized marijuana for medical purposes.
他说，这可能是出于医疗和娱乐目的吸食大麻不断合法化的结果。出于娱乐目的吸食大麻在美国四个州和三大城市是合法的。还有12个州已经将医疗目的吸食大麻合法化。
I'm Jill Robbins.
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