新生

An arbitrary value of 20,000 IU/ml (10'5 copies/ml) waschosen as a diagnostic criterion for chronic hepatitis B at the 2000 NIH conference.

2000年的美国国家健康研究院会议，把10'5copies/ml的值武断地确定为慢性乙型肝炎的诊断标准。

Proficiency is good, but it's probably not growing new synapses.

熟练是有益的，但它可能没有新的突触在生长。