菜单标签对选择食物的影响尚无定论，而且规定刚刚实行，没有确凿事实依据。
The effect of menu labelling on dietary choices remains unclear, and the regulations are too new to produce much evidence.
全世界有许多儿童药物的使用为“标签外使用”(未在药品许可证所列适应症范围内)，即这些药物对儿童的作用尚无定论，并且没有获得许可对儿童使用。
Worldwide many medicines for children are used "off-label", that is their effects on children have not been studied and they are not licensed for use in children.
全世界有许多儿童药物的使用为“标签外使用”(未在药品许可证所列适应症范围内)，即这些药物对儿童的作用尚无定论，并且没有获得许可对儿童使用。
Worldwide many medicines for children are used "off-label", that is their effects on children have not been studied and they are not licensed for use in children.
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