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を
1. indicates direct object of action
2. indicates subject of causative expression
3. indicates an area traversed
4. indicates time (period) over which action takes place
5. indicates point of departure or separation of action
6. indicates object of d...
表示动作的直接对象；表示经过的场所；表示离开或分开的点
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直す， なおす
1. to repair, to mend, to fix, to correct (a mistake, bad habit, etc.), to put right, to restore, to straighten (e.g. a tie), to tidy up (one's hair, make-up, etc.), to revive (one's spirits)
2. to change, to alter, to convert, to translate
3. to put...
修复，修补，修理，纠正（错误、坏习惯等），改正，恢复，整理（如领带），整理（头发、妆容等），振作（精神）；改变，转换，翻译；放回原处，收好；治愈，痊愈；晋升，提拔；重新做一遍，重做
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なければならない， なければなりません， なければいけない
1. have to do, must, should, ought to
必须，应该