1. Riot police with shields were blocking the demonstrators' way. 手持盾牌的防暴警察堵住了示威者的路。
2. The cars blocking the exits could turn this place into a death trap. 那些堵住出口的汽车可能使这地方成为死亡陷阱。
3. The Taliban are blocking food deliveries to central Afghanistan. 塔利班正在阻止向阿富汗中部运送食品。
4. Colonno, taking advantage of these common receptors, devised a strategy for blocking the attachment of rhinoviruses to their appropriate receptors. 科洛诺利用这些常见的受体，设计了一种策略来阻止鼻病毒附着在合适的受体上。
5. With the right device tuned to the right frequency, what's to stop a thief from jamming your setup and blocking that alert signal from ever reaching the base station? 通过将正确的设备调整到正确的频率，如何防止小偷干扰你的设备阻止警报信号到达基站呢？
