The research controlled for differences among the vacationers and those who hadn’t taken a trip, including income level, stress and education.

此项研究受限于参加了旅行的休假者和那些没有去旅行的休假者的不同，包括收入水平，压力和教育程度的不同。

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The northbound geese typically made the trip from sea level over mountain passes of up to 6000 meters in just 7 or 8 hours at speeds of 64.5 kilometers per hour.

往北飞的鹅很典型地在七到八小时内以64.5千米/小时的速度从海平面升高到6000米高空。

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This model demonstrates how the socioeconomic variable, traffic serving level and the socioeconomic variable around traffic zones contributes to the trip generations.

出行生成模型：交通小区通达性和便利程度在很大程度上影响着居民的交通生成量，传统的出行生成预测模型无法反映这一特征。

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Unless a breakthrough is made on this front, the prospects that the relationship between the two countries will move to a new level as a result of this trip are not good.

FORBES: Can China's Relationship With The U.S. Take the Next Step?

Zeitlin and his colleagues found voyagers could be exposed to between 554 and 770 millisieverts of ionizing radiation during the trip, depending on the level of solar activity.

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We assumed there would be an abundance of oysters, but even if the destination turned out to be mundane, the envelope and the complete freedom from expectation added a level of adventure and excitement to the trip.

BBC: The Bureau of Unknown Destinations