transmitter substance

例句：

1. 1. Thetransmitter substance is responsible for the transmissionof signals from one location to another.
   发射体物质负责从一个地点到另一个地点的信号传输。
2. 2. The transmitter substance was found tobe highly toxic and could cause serious healthproblems.
   发射体物质被发现具有高度毒性，可能导致严重的健康问题。
3. 3. The transmitter substance was used inthe development of new medical devices.
   发射体物质被用于开发新的医疗设备。