他似乎把负号误作正号了.He seems to have mistaken a minus for a plus.出现负号的原因与 33-2 节所讲的相同.The reason for the minus sign is the same as in Section 33 - 2 .这个负号表示这个力总是和速度的方向相反.The negative sign describes the fact that this is always o...
他的头上缠满了一层层用床单撕成的绷带。His head was swathed in bandages made from a torn sheet.电话线那头噼里啪啦地传来警察局长短促的声音。The Chief Constable's clipped tones crackled over the telephone line.头枕垫子仰卧。Lie face upwards with a cushion under your...