1. Slot your foot (big toe up, pinky toe down) into the crack up to the arch of your foot, keeping your knee out to the side. 把你的脚尖（大脚趾在上，小指在下）楔入裂缝中去，直到你的足弓的部分，膝盖保持向外。
2. He said the security forces would continue to crack down hard on the protestors. 他说安全部队将继续严厉镇压抗议者。
3. Every minute or so I could hear a snap, a crack and a crash as another tree went down. 几乎每隔一分钟，我就会听见又有一棵树倒下时发出的折断声、噼啪声和塌倒声。
4. Officers will crack down on lunatic motorists who speed or drive too close to the car in front. 警官们将严惩那些超速行驶或与前面车辆追尾的疯狂驾车者。
5. The House voted today to crack down on banks that launder drug money. 下议院今天投票打击为贩毒洗钱的银行。
