重点讲解：
1. first of all
第一；首先；
eg. First of all, you should know what profession suits you.
首先，你该知道什么职业适合你&)[[8U_WuW&].Fi)n[r。
eg. First of all, let's set the scene.
首先让我们来叙述一下背景nUahsPO&*5VU+ML2mDYR。
2. decide to do sth.
决定，拿定主意（做）某事；
eg. He has decided that he doesn't want to embarrass the movement and will therefore step down.
他已拿定主意：他不想令运动陷入困窘的境地，因此决心辞职KJf7!5uSwq=7。
eg. The house needed totally rebuilding, so we decided against buying it.
这所房子需要彻底重建，因此我们决定不买了dz7@m+&,O~Kf!*。