求翻译：自动变速器能根据路面状况自动变速、变矩，具有更好的驾驶性能、行驶性能、安全性能及排放性能。介绍了国外已有的和正在研究的四种自动变速器进行了全面的介绍。阐述了各种自动变速器的结构、传动机理，给出其发展的历史及国内外研究现状，对比了其各种自动变速器的优缺点，并提出了发展趋势。本文还分析了我国对自动变速器的研究基础及现状。是什么意思？

Automatic transmission automatic transmission according to road conditions, variable torque, better driving performance, driving performance, security, performance and emissions performance. Abroad and is working on four automatic transmission has conducted a comprehensive introduction. Described th

Automatic transmission will be in accordance with road conditions, torque converter automatic transmission, with a better driving performance, driving performance, safety performance and emissions performance. On the outside and has been under study by the 4 of the automatic transmission has been fu

The automatic transmission can act according to the road surface condition self-shifting transmission, the bending moment, has the better driving performance, the driving quality, the safety performance and the emissions performance.Introduced overseas had and four kind of automatic transmissions wh

Automatic transmission automatic transmission, torque according to road conditions, driving performance, with better performance, security, performance and emissions performance. Was introduced and already is working on a comprehensive introduction of four kinds of automatic transmission. Lists a va

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