The car is under repair.为何不是repairs?

The car is under repair.为何不是repairs? The car is in repair.和 The car is under repair.意思相同吗?若不同,谢 The car under a tree is Mr. Where to repair the car/Where do repair the car The repairs to the car will cost 500 yuan,________. the highway leading to the city is under repair now为什么是leadi 英语翻译那河在桥下的翻译是The river under the bridge.为何不是The river is und you could help—— the desk a repairing b repair c repairs dre He had to send his car to the garage for repair.请问为什么不是for r The library____ you often borrow books is under repair now.A he was lucky in the accident,but his __car is under repair. LOOK OUT!Don'tget close to the house, _ roof is under repair