01. account for 1说明（原因等）；EG: His illness account for his absence from school. 他因病未能去上学。That accounts for it. 原来如此。 2（将保管的款项）记账； 3对负责( answer for )。02. add up to 1合计，总计(amount to ,count up to )； EG: These figures add up to 117. 2结果。03. allow for 1考虑到(take into consideration)； 2原谅，体谅。 EG: You should allow for his youth. 你应当体谅他还年轻。04. arrive at *在表示“到达”的具体含义时，arrive at/in =get to =reach ;在表示“达成”等抽象含义时，只用arrive at或 reach。.05. ask
