Most changes were in the form of tweaks, instead of major overhauls.

大多数变化的形式屏幕，而不是大的检修。

youdao

Major overhauls or installations may be scheduled during plant shutdowns or over weekends, which requires scheduling of maintenance manpower to work during those periods.

大修或装置可能被安排在工厂停工或在周末，这需要维护的人力调度，在这些时期内的工作。

youdao

Mobile applications often require major design overhauls.

移动应用经常需要进行重大的调整。

youdao

Johnson oversaw two major overhauls of the course, adding hundreds of yards in length and toughening holes as players hit the ball ever-increasing distances.

BBC: SPORT | Golf | New Masters boss rules out women

The Lohan doll is part of Mattel's effort to breathe new life into Barbie, who has undergone few major overhauls since hitting the shelves in 1959.

FORBES: The Barbie Bust

Responsive design should be the norm for current websites but that means major overhauls for most brands. 2013 is the year that such redesigns should be considered mandatory.

FORBES: CES Highlight #2: Tablets