intestine

隋云飞

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) G0 L0 F; m2 M0 I$ G5 Y. b9 Wintestine 是可数名词
; P+ c- n! q6 q& {: o但每个人只有2个intestine,
the large intestine
' c# C% J6 ?) F- ?3 ~6 Ythe small intestine
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所以
# w- k7 H% B+ i: j- _( B" QYour intestineS are the tubes in your body through which food passes when it has left your stomach.
Your mouth, stomach, and intestineS are called your digestive system.
8 @3 G( y  [* n/ N! f这里之所以用复数，就是因为大小肠共称intestineS
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# n6 x4 u0 Y& \* `& J  H! _0 Ibacteria that live in the intestineS 意思当然就是大小肠上的细菌。