But since it? S early in the process, I? M still hitting many places for the first time, and it? S a challenge.
不过现在还处于开始阶段，我仍在持续的首次到访一些地方，这确实是个挑战。
"It has solved the challenge of being alive in a very different way than we knew of," said lead researcher Felisa Wolfe-Simon, a biochemist with the U. S. Geological Survey in Menlo Park, Calif.
“它做到了以与我们所知完全不同的方式生存，”加州门洛帕克的美国地质勘探局的生化学家、首席研究员FelisaWolfe - Simon说。
In order to tackle the challenge of U. s. A., it is necessary for China to adjust strategy in a certain degree, think and handle some great problems well on the choice of tactics.
为了应对美国的挑战，中国有必要进行一定的战略调整，并在策略的选择上思考和处理好一些重大问题。
S. , when it is used as bio_terrorism agent, it can cause medical and psychological impacts, and also is a big challenge for biological reconnaissance and detection.
该事件在造成医疗和心理等方面影响的同时，对生物战剂的侦察和检验也是一个挑战。
S. , when it is used as bio_terrorism agent, it can cause medical and psychological impacts, and also is a big challenge for biological reconnaissance and detection.
该事件在造成医疗和心理等方面影响的同时，对生物战剂的侦察和检验也是一个挑战。
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