重点讲解：
1. point to 显示；表明；
例句：Earlier reports pointed to pupils working harder, more continuously, and with enthusiasm.
早些时候的报告显示学生学习更为刻苦、持久，并且怀有学习热情PFS&]aAfel6uaST0%。
2. be exposed to 使暴露于（险境）；使遭受（危险或不快）；
例句：This plant can't be exposed to strong sunshine.
这种植物不能暴露在强光下~=dihgF;nqB04Q1ej#2S。
3. even if 即使；尽管；纵然；
例句：Even if she is responsible for the mistake, she is not likely to own up to it.
即使是她犯的错，她也不太可能会爽快承认的125hgx7ur6kF。
4. rely on 依赖；依靠；
例句：We will get nowhere if we rely on luck.
如果我们只依靠运气，那将一事无成yIei,cowwmxi1NN76*]i。