Beir
abbr. biological effects of ionizingradiation 電離輻射生物效應
??? 情景例句
You're a real friend!
你是個真正的朋友！
You only live once.
人生只有一次。
The secretary worked late into the night, preparing a long speech for the president.
秘書工作到深夜，為總統準備發言稿。