To give something the green light 給予批準(zhǔn)，開綠燈

　　在行車時(shí)綠燈表示通行。在其它情況下，如果說一個(gè)人給什么事或什么項(xiàng)目開了綠燈 to give something the green light 意思就是此人點(diǎn)頭同意了，批準(zhǔn)了這件事情或這個(gè)項(xiàng)目。

　　例句

　　Great news. The landlord has given us the green light to choose our own flatmate.

　　I read that the university has given the green light for the new library project.

　　請(qǐng)注意

　　另一個(gè)含義相似的表達(dá)是 to get the green light，意思是尋求批準(zhǔn)，得到同意。

　　例句

　　I’ve got the green light to take some extra time off to finish my essay.

　　If you want to go on the field trip you’ll have to get the green light from your parents.