If you create classes that extend Actor directly or indirectly, try to ensure that all invocations against said objects are done through message passing.

如果创建直接或间接扩展Actor的类，那么要确保对对象的所有调用都通过消息传递进行。

youdao

Externalizing is significantly correlated with the proportion of child care provided by day-care centers, and this correlation does extend all the way through to the sixth grade.

外化与日托中心提供的对儿童的教养息息相关，而且这种相关性会一直持续到六年级。

youdao

All messages come in through the service method, which you can extend.

所有消息都通过service方法传入，可以对此方法进行扩展。

youdao

Now, this bill will also cut taxes for struggling businesses, with even larger cuts for small businesses, which means that thousands of entrepreneurs will get the cash they need to avoid laying off workers or closing their doors, and will extend the tax credit for all home buyers through April of next year while strengthening it with stronger anti-fraud measures.

WHITEHOUSE: President Obama Speaks on Fort Hood and Job Numbers