enter service

基本解释

Military planes are more geriatric: the Sikorsky Black Hawk helicopter entered service 31 years ago and the Lockheed C-5 Galaxy 40 years back.
军用飞机更是超龄：西科斯基公司的黑鹰直升机31年前开始服役，洛克希德公司的C-5银河（运输机）早用到40年了。
The award continues a software-sustainment program that has continually updated and improved the B-1's operational capabilities since the aircraft entered service in 1989.
该合同是软件维护的后续合同，自1989年B-1轰炸机服役以来，不断的进行更新和改进。
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FORTY years ago the Boeing 747 first entered service on a Pan Am flight between New York and London.
四十年前波音747在泛美航空公司的纽约——伦敦航线中初次亮相。

It was the biggest boat on the lakes when it entered service.
And after he graduated, he entered the service of an aristocratic family, the Cavandish family, where he became a private tutor to their son.
他毕业后，开始为一个贵族世家工作，也就是卡文迪许家族，在那里他成为了他们儿子的私人教师。
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Boeing's seemingly unassailable lead over Airbus was founded on the success of the 747, which entered service in 1970.
ECONOMIST: A hulking beast joins the dogfight