For an encore, he sang an unaccompanied folk song.应观众再唱一曲的要求, 他清唱了一首民歌.It is estimated that every year 50 unaccompanied children arrive in Britain.据估计，每年有50名儿童独自来到英国。Unaccompanied bags are either searched or removed.单独运送...
Food for the ordinary Soviet troops and NCOs was very poor.苏联普通士兵的伙食很糟糕。Gorbachev failed to keep the component parts of the Soviet Union together.戈尔巴乔夫没能把苏联各成员国团结在一起。In 1990, 200,000 Soviet Jews resettled on Israeli terr...
降低生活力或 “ 近亲繁殖的衰退 ” 并不是近亲繁殖必然的后果.Reduced vigor or " inbreeding depression " is not an invariable consequence of inbreeding.这些染色体畸变都是稳定的, 不影响细胞生活力的.These chromosome aberrations are all stable, compatible with cell viabilit...