The current lags behind the voltage.电流滞后于电压.If the input voltage is plus three , it comes out as minus six.如果输入的电压是+3伏, 那么输出的电压便是-6伏.The units in which we show voltage and current are volt and ampere respectively.我们用以表示电...
Less chemical gets into the subsoil which is particularly important with the light, tropical soils.进入底土的化学物质会减少，这对土质松软的热带土壤而言尤为重要。They embedded the pilings deep into the subsoil.他们把桩深深打进地基下的土中.subsoil cultivator深耕松土机He e...
Steroids are used to reduce the inflammation, which makes the muscles of the airways liable to constriction.类固醇用于消除可能导致气道肌肉收缩的炎症。The pain is produced by constriction of the blood vessels.这种疼痛是由于血管的收缩而引起的。a constriction i...