05-13
Weneedaclearunderstandingoftheproblemsinvolved.我们需要了解清楚所涉及的'各种问题。Thisresearchhasdonemuchtoadvanceourunderstandingoflanguagelearning.这项研究大大提高了我们对语言学习的认识。Stopfussin...
07-25
Theearthtakesayeartomakeacircuitofthesun.地球绕太阳运行一周需要一年的时间。Thetreesformanaturalprotectionfromthesun'srays.树木起天然的'保护作用,遮挡了阳光的照射。Sherolledovertoletthesunbrownherba...