He compiled enough information on his tour of South American capitals to write a book.他在南美各国首都旅游时收集了不少资料，足够写本书。He decided to follow up on his initial research and write a book.他决定继续进行他最初的研究，然后写本书。The autobiographical impulse is normal in old age.人到老年想写本自传是正常的。