sustain circuit

基本解释

To increase the sustain of a musical instrument (e. g. , a guitar or bass), use an equalizer in the Sidechain circuit and boost the EQ in the dominant frequency range of the instrument.
为了增加音乐设备支持（如吉它或贝司），在边链电路里使用一个EQ，并且在设备占有优势频率的范围内提升EQ。
shzhsky.blog.163.com
As expected, the memory circuit in the brains of older monkeys didn't sustain activity as well as in younger monkeys, even though they still performed accurately at this short time scale.
正如研究者们所料，年老猴子大脑中的记忆回路不像年轻的猴子那样能长时间保持活跃，尽管它们也和年轻的猴子一样在2.5秒钟这样短的时间之内也能保持清晰的记忆。
The utility model relates to an electromagnet, which is composed of a yoke iron, an armature iron, a push rod, a pull rod, a starting coil, a sustain coil, a controlling circuit and an end cover.
本实用新型涉及一种电磁铁，有轭铁、衔铁、推杆、拉杆、启动线圈、维持线圈、控制电路和端盖。
ip.com