At the core of most troubleshooting exercises, the following fundamental statement usually applies.

在大多数故障诊断练习的核心部分中，下列基本论断通常都会适用。

youdao

The functionality is the core of the application, or it exercises key interfaces.

功能是应用的核心，或者它使用的关键的接口。

youdao

While using various muscles in the upper and lower body at the same time, functional fitness exercises also emphasize core stability.

训练不仅同时调动上体和下肢的多块肌肉，同时也注重肢体的稳定性。

youdao

Warm up inside, and incorporate stretches (especially for the hamstrings) as well as core-strengthening exercises such as mini sit-ups, crunches, or working an exercise ball.

CNN: Shoveling snow? How to protect your back (and your heart)

Balance is a crucial skill for surfers and one reason that many people who surf do exercises that strengthen the core in their out-of-water workouts.

WSJ: For the Love of Surfing and Wine Country

In addition to jumping for three hours a day, Steven goes to a gym most nights to work with weights, do exercises to strengthen his core or swim sprints across the pool.

WSJ: Two Brothers, One Goal