木馏油是一种仅用于商业的木材防腐剂，它没有用于住宅的许可登记。

Creosote is a wood preservative used for commercial purposes only; it has no registered residential USES.

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如果所有的上课日都有人登记了，家长可登记在替代名单上作为替补或帮助学校的其他活动。

If all school days are filled, the parents need to sign up on the substitute list as a back-up or serve on other school activities.

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