Everything went sweetly and according to plan.

一切按计划顺利进行。

Let's hope everything will go according to plan.

但愿一切都会按计划进行。

He maintains that everything is going according to plan.

他坚持说一切都在按计划进行。

It was all going according to plan, yet small doubts kept nibbling at the edges of his mind.

一切都在按计划进行，只是一些小小的疑虑一直在折磨着他。

If all goes according to plan, the microscope could be generating images by the end of this year.

如果一切按计划进行，该显微镜可能在今年年底生成图像。