的向下运动，一些空气燃料混合气的新鲜充量将被吸入气缸。
A fresh charge of air-fuel mixture will be drawn into the cylinder as the piston moves down toward.
扫气道的设计原则是尽可能减少新鲜充量向排气口的短路损失。
The principle of scavenging port designing is to minimize short circuit losses resulting from the fresh air flowing to the scavenging port.
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