因此，如果不考虑特定年龄段的孩子们目前的认知发展水平，就不能期待他们能够掌握教材。
Consequently, children of a particular age cannot be expected to master educational material without taking into account their current level of cognitive development.
要有良好的外形。假如你想要约会特定年龄段的女孩，这条就十分必要了。你也不想让别人误会你像他爸爸吧。
Be in good physical shape. If you want her to be under a certain age, it helps if you don't look yours.
在特定的年龄段，我们都知道我们喜欢什么样的咖啡、牛排或是男人(女人)。
At a certain age we all know how we like our coffee, how we like our steak, and how we like our men (or women).
嗜睡症发生在相对来说特定的年龄段人群中——十几岁到二十岁这个年龄段，所以如果是高中生或者大学生，这是最常见的症状。
Narcolepsy comes on in a relatively predictable age range, typical in the second decade of life, so when somebody's in, let's say high school or college, that might be a most common age onset.
嗜睡症发生在相对来说特定的年龄段人群中——十几岁到二十岁这个年龄段，所以如果是高中生或者大学生，这是最常见的症状。
Narcolepsy comes on in a relatively predictable age range, typical in the second decade of life, so when somebody's in, let's say high school or college, that might be a most common age onset.
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