學個詞 Learn A Word:1334 toughen

　　今天我們要學的詞是toughen。 Toughen, 作為動詞，意思是變得強硬起來。 "Egypt canceled plans to toughen visa restrictions on tourists after travel companies said the new rules would drive visitors away," 埃及放棄了加強旅游簽證控制的計劃，因為旅游公司說，這樣做會趕走游客。 "China’s top court plans to toughen sea pollution penalties," 中國最高法院將加強對海洋污染行為的懲罰。九月初， "President Obama scrapped a rule that would have toughened air quality standards," 美國總統(tǒng)奧巴馬撤銷了一項原本將加強對空氣質量標準要求的法規(guī)。好的，今天我們學習的詞是toughen...