The present study investigates relationships between three modalities of vocabulary knowledge (passive recognition, active recall and free active written) within two different learning contexts.
本研究探讨了三层面英语词汇量的关系：消极认知、积极回忆和写作词汇。
Automatic recognition of underwater targets is one of the key techniques in modern passive sonar systems.
在现代被动声纳系统中，水下目标的自动识别是关键技术之一。
The techniques of feature extraction, feature selection and design of classifier for passive sonar target recognition are reviewed.
文章对被动声纳目标识别的特征提取、特征选择和分类器设计方面进行了回顾。
Feature extraction of targets radiated noise and design of targets classifier are key technique of passive sonar target recognition system.
目标噪声特征提取和目标分类器设计是被动声呐目标识别系统的关键技术。
Feature extraction of targets radiated noise and design of targets classifier are key issues of passive sonar target recognition system.
目标噪声特征提取和目标分类器设计是被动声纳目标识别系统的关键技术。
The propeller shaft frequency is one of the important target recognition features for passive sonar.
螺旋桨轴频是被动声纳极其重要的目标识别特征之一。
Feature extraction of targets radiated-noise is the key technique of passive sonar target recognition system.
目标噪声特征提取是被动声纳目标识别系统的关键技术。
She set her white face to him , passive , like a helpless animal . Her eyes gave him no sign of love or farewell or recognition .
她苍白的面孔对着他，那么迟钝、被动，像个无助的动物。她的眼里没有向他表示出任何的爱或离情别意，就像不认识他一样。
The research results can be applied to the passive sonar target recognition.
研究结果可以用于被动声呐目标识别。
Passive acoustic recognition for helicopters and cruise missiles is battlefields has attiacted great importance.
目标识别是战场低空飞行目标声预警技术的核心内容之一。
This set of soccer goals passive automatic knowledge systems, design ideas are fired by the detection circuit and to receive recognition circuit composed of two parts.
这套被动式足球进球自动识系统，总体设计思路是由探测发射电路和接收识别电路两部分组成。
Microwave radiometer is the core equipment of passive microwave remote sensing and a powerful tool for ground objects radiation detection, imaging and characteristics recognition.
微波辐射计是无源微波遥感的核心设备，是进行地物背景微波辐射特性探测、成像和判断的主要工具。
Microwave radiometer is the core equipment of passive microwave remote sensing and a powerful tool for ground objects radiation detection, imaging and characteristics recognition.
微波辐射计是无源微波遥感的核心设备，是进行地物背景微波辐射特性探测、成像和判断的主要工具。
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