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| Subject | English | Russian |
| sec.sys. | be alert for | остерегаться (To avoid burns, be alert for hot parts on machines which have just been stopped and hot fluids in lines, tubes and compartments. Johnny Bravo) |
| biol. | be on constant alert for danger | находитьcя в постоянной готовности к опасности |
| Makarov. | be on the alert for something | зорко следить за (чем-либо) |