lose/keep trace/track (of)
暗中已有应急的打算/计划/应急办法, 心中有妙计, 锦囊妙计
keep sth up one's sleeve
暂无补充释义。
keep sth up one's sleeve
暂无补充释义。
lose/keep trace/track (of)
keep sth. a secret from sb.
keep out of
keep quiet
keep under control
keep on
keep one's word
lose/keep one's head