[xiàn suǒ]
clue; thread; clew
keep track of
掌握線索
lose track of
失去線索
threads of a story
故事的線索
clues for solving a case
破案的線索
follow up a clue; trace a clue
追查線索
No clue to his whereabouts has been found.
至今沒有找到有關他行蹤的線索。
Can you give me some track to it?
你可以給我提供一些有關那件事的線索嗎?