The method of releasing tokens differs for request-response and one-way calls.

发行令牌的方法因请求-响应和单向调用而不同。

youdao

Enable reliability even on one-way calls. Use of ordered delivery is optional for one way calls.

即使当单向调用的时候，也要启用可靠性。单向调用不必使用有序传递。

youdao

However, the processes within those layers have different types of responsibilities; one always calls the other, and not the other way around.

不过，这些层中的流程具有不同的职责类型，一个始终调用另一个，但不能进行反向调用。

youdao

Known as Video Share, it lets users make one-way video calls using specific phones for a per-minute or monthly charge.

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So one way or another, it appears that in-flight calls are in the cards.

BBC: More flights allow mobile calls

One way to play it would be to buy insanely out-of-the-money calls on the index, say 15-year options with a strike price of 40, 000.

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