Like grease to a wheel, the emcees keep things spinning smoothly along-- particularly this pair, who provide a change of pace just by stepping on the stage.
如此一來，串場的主持人責任重大，必須像潤滑油，使節目流暢進行。而這對主持人只要往台上一站，氣氛真的馬上不一樣了。