The plane was late and detectives were waiting at the airport all morning. They were expecting a valuable parcel of diamonds from South Africa.

飛機(jī)遲到了，偵探們在機(jī)場等了整整一個(gè)上午。他們都期望得到一個(gè)從南非來的，裝有鉆石的貴重包裹。

A few hours eailier, someone had told the police that thieves would try to steal the diamonds. When the plane arrived, some of the detectives were waiting inside the main building while others were waiting on the airfield.

幾小時(shí)前，有人向警方報(bào)告說有賊想偷這些鉆石。當(dāng)飛機(jī)到達(dá)的時(shí)候，一些偵探就在主樓里等著，其他人就在機(jī)場等著。

PS: while, 表并列

Two men took the parcel off the plane and carried it into the Customs House. While two detectives were keeping guard at the door, two others opened the parcel.

兩個(gè)人將包裹從飛機(jī)上拿下來，把它們放進(jìn)了海關(guān)。這時(shí)兩個(gè)偵探把住門口，另兩個(gè)偵探打開了包裹。

PS: keep guard, 把守

To their surprise, the precious parcel was fulll of stones and sand!

大出所望，這個(gè)珍貴的包裹裝滿了石頭和沙子！

PS: To ones surprise, 令某人吃驚的是