external dose的用法和樣例：
例句
- The total radiation dose should be administered within a predetermined time span.
要在預先規定的時間範圍內完成總的照射劑量。 - The combination of external beam irradiation with brachytherapy may decrease the dose of external irradiation, so the late radiation complication may be reduced.
採用外照射與腔內近距離放射治療可以降低外照射劑量，減輕部分放射併發症。
