自有所得,就能牢固掌握。
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.
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.
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.
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