https://online2.tingclass.net/lesson/shi0529/0008/8124/329.mp3
https://image.tingclass.net/statics/js/2012
[00:02]tentative 試探(性)的,試驗(yàn)(性)的
[00:18]additive 添加的;添加劑
[00:32]objective 目標(biāo),目的
[00:48]narrative 敘述,記敘文
[01:04]arbitrary 任意的,專斷的
[01:19]compulsory 強(qiáng)制的,義務(wù)的
[01:36]anchor 拋錨,停泊
[01:48]