performance-level descriptors是什么意思

Question

关于英语测试学的

Answer 1

performance-level descriptors
性能级描述
performance
n.表演；实行；表现；履行；性能；本事；业绩
例句
His performance gripped the audience.
他的表演深深地吸引住观众。
Proposal is easier than performance.
建议容易实行难。

Answer 2

performance-level descriptors
性能等级描述符
descriptors
描述符
双语对照

词典结果：
descriptors
[英][dɪsk'rɪptɔ:rz][美][dɪsk'rɪptɔ:rz]
叙词;

例句:

1.
The computer broke the images into a number of so-called numerical descriptors.
于是电脑将图像分解为许多所谓的数字描述符。

2.
To look for such distinguishing features, dr shamir programmed the computer to use astatistical method that scores the strength of the distance between the values of two ormore descriptors for each pair of artists.
为了寻找这种能有助于区分的特质，shamir博士设法使计算机能利用一个统计学方法来评价用来比较每两位画家的两个以上的描述符的价值之间距离的大小。本回答被网友采纳

Answer 3

性能等级描述