A fairly basic circuit (left as an exercise, but it's not difficult) can take the control voltage and output a constant current which is proportional to the voltage.

一个相当基础的电路(留作练习，不过并不难)处理控制电压并输出与电压成比例的恒流。

youdao

These films may not make the art-house circuit in America, but for this cinephile at least, they are funny and sophisticated and stand head and shoulders above most mainstream Hollywood films.

在美国此类电影可能不会公开放映，但至少在影迷的心中，它们诙谐幽默，意味悠长，是好莱坞主流影片所望尘莫及的。

youdao

Between 1950 and 1975, three out of every four patents in the circuit courts were ruled invalid or not infringed.

在1950年至1975年间，在巡回法院，每四起专利诉讼中有三起被判无效或未侵权。

youdao

Take an old telephone company: The CEO knows that his future lies with fiber optics and the Internet, not with copper wires and circuit switches.

FORBES: Digital rules

We go to court and not on the talk show circuit.

CNN: Transcript: Judiciary Committee impeachment hearing

Singapore makes lots of other electronics devices: printers, CD-ROM drives, DVD drives and printed circuit boards -- not to mention DRAMs (memory chips) and the sound cards and graphics cards found in PCs.

CNN: ASIANOW - Asiaweek | Business | Short Circuits