You can use the latter two where the one function or element given as the argument is the only feature in the code block that might not be supported.
如果作为参数给出的函数或者元素是代码块中惟一可能不受支持的特性，可选择后两种形式。
2
The argument I'm about to sketch is a purely philosophical argument, not really so much a matter of who can explain this or that feature of us better than anybody else.
我接下来要介绍的,是一个纯粹的哲学论证,并非绝对意义上的,解释优劣决定孰强孰弱
3
To make one executable look like many executables, BusyBox exploits a seldom-used feature of argument passing to the main C function. Recall that the C main function is defined as follows
为了让一个可执行程序看起来就像是很多可执行程序一样，BusyBox 为传递给 C 的 main 函数的参数开发了一个很少使用的特性。