提示：点击例句中的单词，就可以看到词义解释

Trace system calls and signals .

跟踪系统调用和信号。

Translating queries into calls to an api also required the addition of extension methods .

把查询转换成api调用还需要扩展方法（extensionmethod）的加入。

Google calls its spare parts room the pharmacy .

谷歌叫它的空余空间叫做药房。

Large cash calls like that might drain some banks of liquid assets , causing systemic stress .

大量现金的调用有可能使银行流动资产流失，进而导致系统性风险。

It calls the primary constructor , passing the label and a new list to wrap the single callback .

它调用主构造函数，并且传递给它标签和包含了回调函数的新列表。