Going the other way (from nonstatic to static or nontransient to transient) or deleting fields requires additional massaging, depending on the degree of backward compatibility you require.

取决于所需的向后兼容程度，转换字段形式（从非 static 转换为 static 或从非 transient 转换为 transient）或者删除字段需要额外的消息传递。

youdao

With all this attention going to features, most users don't realize that backward compatibility is what they really value most.

由于大多数用户一味地将注意力放在特性上，他们没有意识到向后兼容性（backward compatibility）才是真正最有价值的东西。

youdao

If I am going to buy a car, I'm going to assume they all have wheels that rotate forward and backward on demand and they have a steering wheel, a gas pedal, and a brake pedal that work.

如果我要买车，我会假设它们全部都有符合要求的前后轮、方向盘、油门和刹车。

youdao

"Bailing your kids out of a self-inflicted financial mistake is going backward, " Garrett says.

FORBES: Magazine Article

And on issue after issue, we cannot afford the next four years going backward.

WHITEHOUSE: The White House

The choice between going backward and moving forward has never been so clear.

WHITEHOUSE: Remarks by the President at a Campaign Event -- Fairfax, VA