1.permit to do 允許(做某事)
In China, no official permit to sell GM rice has ever been issued, yet GM rice has reportedly found its way into consumer markets in parts of central and southern China.
在中國,雖然還沒有任何銷售轉基因水稻的正式許可,然而有報道說在華中和華南部分地區的市場上已經出現了轉基因大米。
2.alert to 隨時注意
We must be alert to the possibility of danger.
我們必須隨時注意危險的可能性。
3.smile at 對...微笑
Everyone stopped to look and smile at us.
每個人都停下來看著我們,并對著我們微笑。