Every living thing has its skin which is an invisible physical boundary.
举一反三
- Everything has its own __. Every thing changes from its own __.
- Living in the central Australian desert has its problems, of which _____ water is not the least.
- Every generation has its own youth culture, which doesn’t contribute to the generation gap.（ ）
- horoscopetransplantationemotionsbiologicalside by sidejetlagsensitivenormalperiodspregnantdonordietrejection5.“Body clocks”are __________ methods of controlling body activities. Every living thing has one. In humans, a body clock controls ____________________of sleeping and waking.[音频]
- Every ____ has its day.