Beast of burden
出國 Abroad馱畜,馱載用的大牲口
?? 牛津釋義
beast of burden
animal, such as a donkey, used for carrying heavy loads on its back 力畜, 役畜, 牲口（如驢）.
?? 詞語組成解析
beast
[bist]
n. 野獸;人面獸心的人;討厭的人（或事物）;老頑固，壞蛋;
of
[?v]
prep. 關于;屬于…的;由…制成;
aux. 助動詞 [非標準用語、方言] =have [主用于虛擬語氣];
burden
['b?dn]
n. 負擔，包袱;責任，義務;載貨量;（詩歌，發言等的）重點;
vt. 使煩惱，勞累;向（車，船等）上裝貨;
??? 情景例句
John is tied up at the present time.
John現在有事。
What size suitcase do you own?
你擁有什么尺寸的提包？
Yes, that is absolutely right.
啊，對的，是應該這樣。