短語詞組短語modern instrumental observation period 器測時期repeated observation period 複測周期Duration of observation period 觀察時間default observation period 違約觀察期observation period of underwriting 承保觀察期Intensive Observation Period 密集觀測期long -period observation 長期觀測period of observation 觀測周期the period under observation 觀察期 返回 observation period