“全心地投入”可以用以下几种英语表达：
1、 Devote oneself wholeheartedly
示例：She devoted herself wholeheartedly to her work.（她全心地投入到工作中。）
2、 Be fully committed to
示例：He is fully committed to this project.（他全心地投入到这个项目中。）
3、 Put one's heart and soul into
示例：They put their hearts and souls into preparing for the competition.（他们全心地投入到比赛的准备中。）
4、 Be completely engrossed in
示例：She was completely engrossed in her studies.（她全心地投入到学习中。）
5、 Be totally absorbed in
示例：He was totally absorbed in painting.（他全心地投入到绘画中。）
这些表达都传达了“全心地投入”的意思，可以根据具体语境和表达习惯选择合适的表达方式。