常見例句One of two defensive backs;a safetyman. 最后方的后衛(wèi)：兩個防守方的后衛(wèi)之一；11 Radiography work must be carried out by at lease two (2) persons certified as radiographers, one (1) of which will act as a supervisor, the other will act as the safetyman and assistant. 放射性施工應(yīng)由至少兩名合格的放射線技師進(jìn)行，一人監(jiān)督，另一人負(fù)責(zé)安全和協(xié)助。 返回 safetyman