单数部落　一块／片牛肉干 a piece of beef jerky
一袋牛肉干 a packet/bag of beef jerky
复数部落　两块／片牛肉干 two pieces of beef jerky
两袋牛肉干 two packets/bags of beef jerky
beef /bi?f/ n. 牛肉
jerky /?d???ki/ n. 肉干
会话急救包
吃牛肉干 eat beef jerky
A：Would you like to eat some beef jerky?
你想吃点儿牛肉干吗？
B：No, thanks. May I have a glass of lemonade?
不用了，谢谢。我能喝一杯柠檬汽水吗？
lemonade /?lem??ne?d/ n. 柠檬汽水，柠檬水
把一块／片牛肉干撕成两半 tear a piece of beef jerky in half
A：Can you help me tear this piece of beef jerky in half, please?
你能帮我把这块／片牛肉干撕成两半吗？