例句與造句

1. This is defined by IEC 60268-10 as, " . . . the duration of a burst of sinusoidal voltage of 5000 Hz at reference level which results in an indication 2 dB below reference indication . " This standard also contains tables showing the difference between indicated and true peaks for tone bursts of other durations.
2. It's difficult to find reference indication in a sentence. 用reference indication造句挺難的