这就是为什么高频变压器经常有空气的核心。

This is why high frequency transformers often have an air core.

youdao

这种缺乏静态，直流偏移电流输出变压器的核心手段，可更小，因为它不需要空气间隙，以防止核心饱和从静态直流偏移电流。

This lack of static, DC offset current in the output transformer means that the core can be made smaller, because it requires no air gap to prevent core saturation from the static DC offset current.

youdao

这个无意识的空气缺口足够阻止样品变压器发生饱和。

This unintended air gap was enough to keep the sample transformers from saturating.

youdao