It has been replaced by dead-bolt locks, security chains, electronic alarm systems and trip wires hooked up to a police station or private guard firm. Many suburban families have sliding glass doors on their patios, with steel bars elegantly built in so no one can pry the doors open.
参考译文：取而代之的是防盗锁、防护链、电子报警系统，以及连接警署或私人保安公司的报警装置。郊区的许多人家在露台上安装了玻璃滑门，内侧有装得很讲究的钢条，这样就没人能把门撬开。
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