Doppler modulated echo information of helicopter rotors has a better stability of the aircraft's attitude, which is the main information source of radar identifying helicopters.
旋转部件的多普勒调制信息具有良好的姿态角稳定性，是雷达识别直升机的主要信息来源。
A specialized biological information database which is easily maintained and renovated is established by using Internet as the main information source to collect the latest information.
以国际互联网的文献资料为主要信息源，建立了一个易于维护和更新的大规模的专业化生物学文献数据库。
Aerial photography is the main information source of remote sensing and military reconnaissance. The sufficiency and accuracy of acquired information can be directly affected by aerial image quality.
航空摄影是遥感和军事侦察的主要信息源，航空图像质量的好坏直接决定着所获取信息的充分性和准确性。
Aerial photography is the main information source of remote sensing and military reconnaissance. The sufficiency and accuracy of acquired information can be directly affected by aerial image quality.
航空摄影是遥感和军事侦察的主要信息源，航空图像质量的好坏直接决定着所获取信息的充分性和准确性。
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