重点讲解：

1.front line前线

Information officers are in the front line of putting across government policies.
新闻发言官处于传达政府政策的第一线Nq7!)W*sU~rylPC。

2.from the bottom of our heart从心底

We will always remember and we are grateful from the bottom of our heart for the vigorous support and help the African countries and people have given to our development effort.
我们始终铭记和衷心感谢广大非洲国家和人民对中国发展给予的大力支持和帮助v8Pl;5jjaZ_ARI=l(。