We don't believe you need open strings anymore.

我们不认为你还需要开放弦做什么。

These strings may have ends (the so-called open strings) or they may be joined up with themselves in closed loops (closed strings) (Fig.

这些弦可能有末端（所谓的开弦），或者它们可能以闭环（闭弦）的形式与自身相连（图 1）。