a line or pattern that looks like a Z or a row of Zs joined together锯齿形线条;之字形
a situation in which actions, plans, or ideas change suddenly and completely, and then change back again equally suddenly(行动、计划或想法)突然变来变去
also zig and zag to make a movement or shape like a zigzag呈之字形移动,曲折行进
to change suddenly and completely, and then change back again equally suddenly突然且彻底的变化,随后又突然变回原样
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