devotetodoingsth还是devotetodosth

devote to doing sth，例如：

1、The more time you and your partner devote to making your relationship strong， the longer it will last.你和伴侣用于经营恋情的时间越长，你们的恋情持续的时间也越长。

2、That will give them more time to devote to upselling add-ons such as extended warranties， paint and fabric protection， and rust-proofing.这会使他们留出更多的时间向消费者推销延长质保、喷漆、织物保护、防锈等附加服务。