reinforcementn.
英 riːɪn'fɔːsm(ə)nt | 美 ,riɪn'fɔrsmənt
中文n. 加固；增援；援军；加强
词根词源
reinforcement (n.)c. 1600, "act of reinforcing," from reinforce + -ment. Meaning "an augmentation, that which reinforces" is from 1650s. Related: Reinforcements.
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