Section B Vocabulary be apt to:be likely to倾向于 tumble:to fall quickly and without control 倒，摔跤 trip:to lose your balance after knocking your foot against sth when you are walking or running绊倒 *speculate:to buy and sell in the hope that the value of what you buy will increase and that it can then be sold at a higher price in order to make a profit推测，思索，做投机买卖 indorse:to write your signature on the back of a check,in order to make it payable to someone else签名于票据等的背面，认可Section B Vocabulary ❖ be apt to: be likely to倾向于 ❖ tumble: to fall quickly and without control跌 倒，摔跤 ❖ trip: to lose your balance after knocking your foot against sth when you are walking or running绊倒 ❖ speculate: to buy and sell in the hope that the value of what you buy will increase and that it can then be sold at a higher price in order to make a profit推测，思索，做投机买卖 ❖ indorse: to write your signature on the back of a check, in order to make it payable to someone else签名于票据等的背面，认可 ❖ surplus: an amount or a quantity in excess of 过剩的