noun
介词，前置词。
(grammar, strict sense) Any of a class of non-inflecting words typically employed to connect a following noun or a pronoun, in an adjectival or adverbial sense, with some other word: a particle used with a noun or pronoun (in English always in the objective case) to make a phrase limiting some other word.
"Understanding prepositions, like "on," "in," "at," and "to," is crucial for building grammatically correct sentences. "
理解介词，比如“on”、“in”、“at”和“to”，对于构建语法正确的句子至关重要。
