on the lookout

• 了望着,注视着,警惕者

词汇搭配

• place someone on the lookout for 使某人(对…)保持警...
• place someone on the lookout 使某人(对…)保持警...
• put someone on the lookout for 使某人(对…)保持警...
• put someone on the lookout 使某人(对…)保持警...