So, that means we fix in advance the direction in which we are going to shoot a ray from the origin.

这就意味着，给定一条从原点出发的射线。

youdao

You have to fix visits up in advance with the museum.

你得预先和博物馆联系安排好参观事宜。

《牛津词典》

Just in the past few weeks there have been major vulnerabilities discovered that forced Microsoft to issue fix-it tools in advance of official patches.

仅在过去的数周，已经有发现重大漏洞迫使微软在官方补丁发布修补工具。

youdao

Hedging allows companies to fix the price of a currency months in advance.

BBC: Launching new models ate into BMW's finances

On Monday, Moscow and Brussels agreed to notify each other in advance of any problems affecting energy supplies, and to work together to fix them.

BBC: EU concern at Russia human rights