overhaul

• 名词，指对机械或系统进行彻底的检查和修理，也指对某事物进行根本性的更新和改进。

A noun referring to a thorough examination and repair of a machine or system, or a major renovation and improvement of something.

1. Maintenance or repairB2formal

   A thorough examination and repair of a machine or vehicle, often done at regular intervals.

   大修

   • The car needs a complete overhaul after 100,000 miles.
   • The engine overhaul took three days to complete.
   • Regular overhauls can extend the life of heavy machinery.

   同义词checkupmaintenancerefitrepairserviceservicingtune-up

2. Major improvement or renovationB2formal

   A significant process of renewing, restoring, or improving a system, organization, or structure.

   全面改革

   • The company underwent a major operational overhaul.
   • The government announced an overhaul of the healthcare system.
   • The old building received a complete overhaul to modernize its facilities.

   同义词makeoverreconstructionreformrefurbishmentrehabilitationrenovationrestorationrevamp

   反义词decaydeteriorationneglect

• 动词，指对某物（常为机器或系统）进行彻底检查、修理或更新，使其恢复良好工作状态。

A verb used to indicate the act of thoroughly examining, repairing, or renovating something, often a machine or system, to bring it back to good working order.

1. Travel pastB2formalbritishsport

   To catch up with and pass someone or something, especially in a race or journey.

   超越

   • The racing car overhauled its rival on the final lap.
   • The ship overhauled the smaller vessel in the open sea.
   • He managed to overhaul the leading runner just before the finish line.

   同义词catch up withleave behindoutdistanceoutstripovertakepass

2. Make repairs or adjustmentsB2formal

   To thoroughly examine and repair or improve something, such as a machine, system, or process.

   彻底检修

   • The mechanic had to overhaul the entire engine.
   • The company plans to overhaul its outdated computer system.
   • They decided to overhaul the curriculum to meet modern standards.

   同义词fixrebuildreconditionrefurbishrenovaterepairrestorerevampservice

   反义词breakdamageignoreneglect