tracking symbol的用法和樣例：
例句
- The visual environment for symbol designing ensures expansibility of the interoperable symbol library.
可視化的符號設計環境保證了互操作符號庫的可擴展性。 - That rock was a symbol of Him who by His death would cause living streams of salvation to flow to all who are athirst.
磐石就是基督的表號，象徵著他的死，必使救恩的活水流給一切口渴的人。
