英語六級攻克閱讀關鍵句322. As the driver approached the point of ent
322. As the driver approached the point of entry for the highway, devices installed on the roadside would electronically check the vehicle to determine its destination and to ascertain that it had the proper automation equipment in good working order.
譯文 當司機到達高速路的入口處時，安裝在路邊的設備就會自動檢查車輛，以測定它的目的地并且確定這輛車的專有自動化設備運轉正常。
點睛 本句的主干是...devices...would...check the vehicle...。as引導的是一個時間狀語從句；過去分詞短語installed on the roadside作定語修飾devices；兩個并列的不定式短語to determine...和to ascertain...作主句的目的狀語；that引導的賓語從句that it had the proper...working order作ascertain的賓語。
determine在句中意為“測定，確定”，該詞還有“（使）下定決心；決定”之意。如：
They determined to go to the airport at once. 他們決定立刻去機場。
ascertain意為“確定，查明，探知”。如：
You should ascertain what services the bank is offering. 你應該查查看該銀行提供何種服務。
proper在句中意為“特有的；固定的”。如：
Language is proper to mankind. 語言是人類所特有的。
該詞還有“適當?shù)?，得體的”之意。如：
Such behavior isn't quite proper. 此等行為不甚得體。
考點歸納 ascertain、find、discover和detect這些動詞均有“發(fā)現(xiàn)”之意。
ascertain為較正式用詞，指有意查明或發(fā)現(xiàn)。如：
The police are trying to ascertain what really happened. 警方正設法查個水落石出。
find為普通用詞，可指偶然發(fā)現(xiàn)，也可指經(jīng)過尋找后得到或重新獲得已失去的東西，強調(diào)結果。如：
The police found her bag. 警察找到了她的包。
discover指發(fā)現(xiàn)本來已經(jīng)存在，后來才被人認識的事物、真理或情況。如：
Columbus is said to have discovered America in 1492. 據(jù)說哥倫布于1492年發(fā)現(xiàn)了美洲。
detect為正式用詞，含有“偵察”之意，強調(diào)經(jīng)過仔細觀察或研究而有所獲得和發(fā)現(xiàn)，尤指發(fā)現(xiàn)有意隱藏之物。如：
He could detect a certain sadness in her face. 他能在她臉上察覺到一絲悲傷。
