Though development of the plane is on track and two test versions have been delivered to the Navy, budget cuts may keep the planes grounded for at least a year longer than planned.

虽然该飞机的研发正常，有两个测试版本已交付海军使用，但是削减预算将至少使之延期一年。

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During the recession,many airlines canceled aircraft orders or grounded older planes as passenger demand declined.

VOA: standard.2010.03.30

Routes are disappearing, planes grounded, baggage charges rising, and now airlines are employing every tactic to lighten their loads to save fuel bills.

CNN: Strict diets for airlines as fuel costs soar

The volcano has already caused severe disruption to flights in South America, with planes grounded for several days in Chile, Argentina, Uruguay and Brazil.

BBC: Chile volcano: Qantas cancels Melbourne flights

Boeing's reputation has taken a blow in recent months after its latest Dreamliner 787 planes were grounded after batteries on some planes emitted smoke.

BBC: Ryanair to expand by 30% with bumper Boeing order