9 sentences

1. 他投身于正义的事业中。

   tā tóu​shēn yú zhèng​yì de shì​yè zhōng.

   He devoted himself to a just cause.

   Source: Dong Chinese Dictionary

2. 他决定投身于环保事业。

   tā jué​dìng tóu​shēn yú huán​bǎo shì​yè.

   He decided to devote himself to environmental protection.

   Source: Dong Chinese Dictionary

3. 他决定投身于这项终身事业。

   tā jué​dìng tóu​shēn yú zhè xiàng zhōng​shēn shì​yè.

   He decided to dedicate himself to this lifelong career.

   Source: Dong Chinese Dictionary

4. 他决心投身于振兴民族的大业中。

   tā jué​xīn tóu​shēn yú zhèn​xīng mín​zú de dà​yè zhōng.

   He is determined to devote himself to the great cause of national rejuvenation.

   Source: Dong Chinese Dictionary

5. 他投身于将军的幕下，为其出谋划策。

   tā tóu​shēn yú jiāng​jūn de mù xià, wèi qí chū​móu​huà​cè.

   He joined the general's staff to offer strategies and advice.

   Source: Dong Chinese Dictionary

6. 无数仁人志士投身于抗日救国的运动中。

   wú​shù rén​rén​zhì​shì tóu​shēn yú kàng Rì jiù​guó de yùn​dòng zhōng.

   Countless patriots devoted themselves to the movement to save the nation from Japanese aggression.

   Source: Dong Chinese Dictionary

7. 他决定弃文从武，投身到保卫国家的战争中。

   tā jué​dìng qì wén cóng wǔ, tóu​shēn dào bǎo​wèi guó​jiā de zhàn​zhēng zhōng.

   He decided to give up civil pursuits for a military career and join the war to defend the country.

   Source: Dong Chinese Dictionary

8. 他胸中怀着崇高的理想，投身到祖国建设中。

   tā xiōng zhōng huái zhe chóng​gāo de lǐ​xiǎng, tóu​shēn dào zǔ​guó jiàn​shè zhōng.

   With lofty ideals in his heart, he devoted himself to building the motherland.

   Source: Dong Chinese Dictionary

9. 在那个时代，无数年轻人投身于改革开放的大潮中。

   zài nà gè shí​dài, wú​shù nián​qīng​rén tóu​shēn yú gǎi​gé​kāi​fàng de dà​cháo zhōng.

   In that era, countless young people threw themselves into the tide of reform and opening up.

   Source: Dong Chinese Dictionary