EmptAHDˈemptEconomist²⁴¹⁰⁶⁺⁶ 基本例句 恩普特¹⁰⁰ But the ease with which the militants struck raised tough questions about who was helping them, and why the country's security services had failed to pre- empt the attack. 然而，袭击者如此轻易就得逞，这使人们产生了很大的疑问：有谁在帮助他们，为什么安全部门没有对此次袭击提前采取行动。 yeeyan