With a heparin lock, a catheter is placed in the vein, a drop of the blood-thinning medication heparin is added to prevent clotting, and the catheter is locked off.
肝素帽是在静脉里放置导管，添加血液稀释的肝素滴液以预防血管栓塞，而导管被锁住。
2
He notably does not use the term "lock down", but says that all hands drop other tasks, and are mustered to find the errant drive.
他显然不用“锁定”这个词，不过他补充道，所有的人都会放下手头的任务，被召集起来寻找错误的硬盘。
3
You might recall the graphs from last month's column showing how throughput can drop dramatically once multiple threads contend for a built-in monitor lock using synchronization.