But it is a single-level evaluation model.
但它是一种单层次的评价模型。
The Context level treats the entire system as a single entity: a black box.
环境级别将整个系统视为一个单一的实体：黑盒子。
How at one level we are cellular beings and another we are a single "self."
从某种角度看，我们是多细胞生物，但从另一角度看，我们还有一个单纯的‘自我’。
You can't level a city to destroy a single military unit located there.
不能因为摧毁一个军事目标而摧毁一座城市。
They observed this at the level of a single DNA molecule.
他们在单个DNA分子水平对此进行了观测。
This simple, audio-visual method can only create single level submenu in the menu bar.
这种方法直观、简捷，仅限于制作菜单栏上的单级子菜单。
From the street, only a single level of the house is visible.
从街上看来，住宅只有一层。
From the street, only a single level of the house is visible.
从街上看来，住宅只有一层。
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