自有所得，就能牢固掌握。

Once he does so he is able to master it firmly.

youdao

这本书将使学生牢固地掌握英语语法。

This book will give your students a firm grasp of English grammar.

《牛津词典》

这些知识孩子不用刻意地去记忆，就能牢固地掌握。

These children need not deliberately to memory, can firmly grasp.

youdao

这些知识孩子不用刻意地去记忆，就能牢固地掌握。

These children need not deliberately to memory, can firmly grasp.

youdao