问如何在Nao机器人上完成一个命令后执行另一个命令( javascript)

EN

session.service("ALTextToSpeech").done(function (tts) {
    tts.say("Hello world.");
}).fail(function (error) {
    console.log("An error occurred:", error);
});

session.service("ALBehaviorManager").done(function (behavior) {
    behavior.runBehavior("Stand/Emotions/Positive/Winner_1");
}).fail(function (error) {
    console.log("An error occurred:", error);
});