學(xué)個(gè)詞 Learn A Word:1334 toughen

　　今天我們要學(xué)的詞是toughen。 Toughen, 作為動(dòng)詞，意思是變得強(qiáng)硬起來(lái)。 "Egypt canceled plans to toughen visa restrictions on tourists after travel companies said the new rules would drive visitors away," 埃及放棄了加強(qiáng)旅游簽證控制的計(jì)劃，因?yàn)槁糜喂菊f(shuō)，這樣做會(huì)趕走游客。 "China’s top court plans to toughen sea pollution penalties," 中國(guó)最高法院將加強(qiáng)對(duì)海洋污染行為的懲罰。九月初， "President Obama scrapped a rule that would have toughened air quality standards," 美國(guó)總統(tǒng)奧巴馬撤銷了一項(xiàng)原本將加強(qiáng)對(duì)空氣質(zhì)量標(biāo)準(zhǔn)要求的法規(guī)。好的，今天我們學(xué)習(xí)的詞是toughen...