to move at high speed

(literary) particle used at the end of a sentence to indicate a judgment, explanation, or to strengthen an affirmative or interrogative mood; or used mid-sentence after a word or phrase to indicate a pause or emphasize the topic

Used after a noun, verb, or pronoun to indicate that something is like or seems like the thing mentioned; often used in the 像 xiàng ... shì de pattern to mean "just like" or "as if".