裹足不前
fight shy of.
at a standstill.
drag one's heels.
eg：the shy girl hung back and refused to participate in the contest.
中英俚语俗语来源：李斯 ·谏逐客书：“使天下之士，退而不敢西向，裹足不人秦。”
同义词：停滞不前 get bogged down.
反义词：争先恐后 the devil take the hindmost.
