在千鈞一髮之際

1. • at the critical moment in the nick of time

Character by character

• 在(zài)exist
• 千(qiān)thousand
• 鈞(jūn)30 catties
• 一(yī)one
• 髮(fà)hair
• 之(zhī)(possessive particle, literary equivalent of 的 de)
• 際(jì)border