虽然YRBSS的结果指出大量青春期少年有风险，但是确定特定的人群仍然是极困难的。
Although the YRBSS results indicate that large Numbers of youth are at risk, it is extremely difficult to identify specific individuals.
如此直爽的言论与这个极注重实效的城市的选民们产生共鸣，而且这的确可能成为2010年中期选举中的令人信服的信息。
That straight talk resonated with voters in a highly pragmatic city, and it could indeed be a convincing message in the 2010 mid-term elections.
拔节至抽穗期干旱胁迫极显著地降低冬小麦的氮素营养效率。
The drought stress from jointing to heading stage decreased nitrogen nutrition efficiency of winter wheat significantly.
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