1. the determiner of forming an ice dam is surface regime; 形成冰坝的决定性因素是水面流态；
2. Singular nouns are used only in the singular, always with a determiner. 单数名词只有单数形式，总是与限定词连用。
3. Plural count nouns do take a determiner when they referprecisely to particular things of people. 当可数名词复数指特定的人物或事物时必须要用限定词。
英英解释
n.
1. an argument that is conclusive
2. one of a limited class of noun modifiers that determine the referents of noun phrases
3. a determining or causal element or factor
