Test提供了许多自动编写测试脚本的函数。
Test provides a number of functions that automate writing test scripts.
由于许多自动执行的任务往往倾向于数据库密集型，因此用户不希望随机执行这些操作。
Since many automated tasks can tend to be database-intensive, you do not want these actions executed at random.
此外，交易机构使用的许多自动程序都会获取收盘时的价格，一旦交易员开始纷纷选择卖出，这会带来更严重的瓶颈。
Additionally, many automated programs trading firms use are set to get end-of-day prices, which can create an even more frenzied bottleneck once traders start rushing for the exits.
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