That 's not just because the host , Alex Trebek , briefly regrew a mustache after 13 clean-shaven years , but also because some contestants showed they could still rile an audience .
不仅是因为主持人亚历克斯·特里贝克（AlexTrebek）留起了胡子（之前13年他都是把胡子剃得干干净净），而且是因为仍有些选手表明自己能刺激观众。
alex trebek