be into [bi: ˈɪntuː]

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附加级

给迷住，对 ... 深感兴趣，深深卷入

These plants may be into flower by Christmas. 这些植物到圣诞节就可能开花了。来自《简明英汉词典》
She must be into her thirties by now. 她一定30来岁了。来自《简明英汉词典》