October 27, 2008-the five-year fight against a deadly strain of avian influenza may be at a turning point.
2008年10月27日—为战胜致命性禽流感病毒而进行的长达五年的战斗可能正处于一个转折点。
The financial strain has reached a critical point. From 1978 to 2001, libraries at the University of California at Los Angeles, for example, saw their subscription costs alone climb by 1, 300 percent.
这种开支带来的经费压力已经非常严重,1978年至2001年间,加州大学洛杉矶分校图书馆仅期刊订阅费用一项就激增了13倍。
When the stress reaches the yield point, a large increase in strain occurs with no increase in stress.
当应力达到屈服点,应变会急剧增大而应力保持不变。
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