.mergeExpression(words, 2, wordSize, Operation.OBJECT)
: (IExpression) word2));
} else if (word2 instanceof String) {
String word = (String) word2;
// 首个词是字符串, 是函数开始语句
IFunction function = (IFunction) engine.createNode(word, true);
function.init(template, word);
function.syntax(template, words, wordSize);
if (function.setParent(this)) {
addStatement(function);
}