难度大的文本标为正值，简单的文本标为负值。
Difficult texts record a positive score and simple ones score negative numbers.
那时正值人们的态度开始变化，许多新思想正在流行。
It was just when attitudes were really beginning to change and lots of new ideas were coming in.
周二发表的这份报告，正值人们越来越担心渔业和气候变化对南极的影响之际。
The report, published on Tuesday, comes amid growing concern about the impact of fishing and climate change on the Antarctic.
当时意大利正值阳光最充沛的时节。
国家正值国泰民安、繁荣昌盛的时期。
当时正值战争。
此次修订正值绿色营销兴起之际。
The revisions come at a time when green marketing is on the rise.
我十几岁的时候，正值冷战时期。
正值夏天旅游旺季，海滩上都是晒太阳的人。
During summer tourist season, the beach was thick with sunbathers.
我取正值。
这些发现成果的出现正值人们对南极洲的未来日益担忧之际。
The findings come amid growing concern over the future of the Antarctic.
眼下正值樱花绽放的季节，是人们通宵在樱花下喝酒聚会的时候。
It is a cherry-blossom season, a time of all-night sake-drinking parties under the sakura.
今年正值玛丽·雪莱的《弗兰肯斯坦——现代普罗米修斯》出版两百周年。
This year marks exactly two centuries since the publication of "Frankenstein; or, The Modern Prometheus," by Mary Shelley.
田纳西面包公司于1997年提前开业，当时正值美国麦当劳的快餐销售衰退。
The Tennessee Bun Company opened ahead of schedule in 1997, in time for a slump in U.S. fast-food sales for McDonald's.
让事情更糟的是，它的肆虐生长正值当时农业的彻底改变及由牧羊业向乳品业的巨大转变之际。
What made matters worse was that its proliferation coincided with sweeping changes in agriculture and a massive shift from sheep farming to dairying.
美国宇航局喷气动力实验室等高科技行业发现，他们最好的全能问题解决者是正值壮年的修理大师。
High-tech industries such as NASA's Jet Propulsion Laboratory have found that their best overall problem-solvers were master tinkerers in their youth.
他们说二阶导数转为正值了。
所有收入或利润都为正值。
不过这一切正值中国电影产业复苏之际。
But it also comes amid a rebirth of the Chinese film industry.
以下是五位专家认为真正值得分享的事情。
这正值一个关键时刻。
他们应该正值人生的黄金时期。
那时正值九月，书店里又热又闷。
它是正值还是负值，毫不相干。
指向右的取正值，指向左的取负值。
Counting positively what goes to the right, negatively what goes to the left.
正值年少，撒谎是连串因果的实验。
For the very young, lying is a series of cause-and-effect experiments.
然后变为正值，这部分曲线上的话，是正值的。
And then it becomes positive and this part of the curve contributes positively.
你知道你真正值得拥有什么。
他们才是真正值得在意的人。
他们才是真正值得在意的人。
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