once and only once的意思

once and only once中文翻譯：

一次且僅一次

相似詞語短語

only once───只有一次；只此一遭

once───conj.一旦；adv.一次；曾經；n.一次，一回

once just once───一次就一次

for only once───只有一次

once once more───再來一次

once and again───再三；一而再；一而再，屢次

was once───曾經

a once───一次

once inside───一旦進入

雙語使用場景

Use QoS 2 when a message is to be delivered once and only once.───當消息僅傳遞一次時，使用QoS 2。

Once and only once" is the Extreme Programming phrase.───一次且僅一次”是極限編程的座右銘。

It also makes sure dependencies are loaded once and only once.───它也確保依賴項已經加載一次，且僅加載一次。

Reliable messaging refers to the ability of a sender to deliver a message once and only once to its intended receiver.───可靠的消息傳遞是指發送方向它所期望的接受方傳遞一次并且只傳遞一次消息的能力。

A second problem was handling sequential messages in an idempotent fashion, such that they are executed once and only once.───第二個問題是以冪等方式處理序列消息，這樣這些消息被執行一次，且一次。

A receive or pick activity must be executed once and only once if a process is to be executed normally.───如果流程要按照正常方式執行，則接收或選擇活動必須執行一次，且僅執行一次。

Communication is also reliable because messages are guaranteed to be delivered once and only once when using JMS.───通信還是可靠的，因為使用JMS時系統保證消息被傳送一次而且僅傳送一次。

Why do you think the essence of good design is once and only once?───為什么你會認為這是良好設計所必不可缺的要素呢？

This family expresses periodically to regulate DNA replication and ensure DNA replication once and only once in every cell cycle.───該蛋白家族呈周期性表達，調節DNA復制，使得每個細胞周期的DNA復制一次且僅有一次。

英語使用場景

During the S phase, the DNA replicates once, and only once.

The DNA must replicate completely, once and only once.