If we see someone in a wheelchair, we assume they cannot walk. 当我们看到有人坐在轮椅上，我们就认为他们不会走路。 It may be that they can walk three, four, five steps. That, to them, means they can walk. 或许，事实上他们可以走上好几步。 而这，对
Remarks of President Barack Obama As Prepared for Delivery Weekly AddressFebruary 6, 2010 Even though our economy is growing again, these are still tough times for America. Too many businesses are sti
THE PRESIDENT: Good morning. Today, Laura and I are in Latin America, where we are visiting five countries: Brazil, Uruguay, Colombia, Guatemala, and Mexico. These countries are part of a region that
Where does the end begin?Well, for me, it all began with this little fellow.This adorable organism --well, I think it’s adorable --is called Tetrahymena and it’s a single-celled creature.It’s also b
