Even the test ban and a new treaty to cut off production of fissile material—both obvious first steps to a nuclear-free future—will be dogged with difficulty.

即使是禁止核试验和起草一份降低核裂变材料生产的新条约-----很显然，二者都是迈向无核未来的第一步----困难也将会如影随形。

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The characteristics of the test signals were analyzed and weak defect echo signals were successfully extracted by cut-off frequency technique.

分析了检测信号的特征，并采用截止频率法成功地提取了微弱的缺陷回波信号。

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The high sensitivity of the new procalcitonin test has allowed the scientists to establish realistic cut-off values to help guide clinicians in identifying children who are at low risk for SBIs.

这项降血钙素测试高灵敏性允许科学家去建立准确的评估以帮助指导临床医生去识别哪些儿童是低风险的细菌感染者。

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First, ending the stalemates on the Fissile Material Cut-off Treaty and the Comprehensive Nuclear Test Ban Treaty.

BBC: In full: Brown security statement

Johnson says he tries to act as a mentor, or life coach, for his students, helping them handle the off-court stress of trying to cut high enough grades and test scores for an Ivy League college.

WSJ: How Squash Got Serious