讲解：
undertake sth
承担；从事；负责:
University professors both teach and undertake research.
大学教授既要教学又要从事研究工作。

bother doing
花费时间精力(做某事):
Why bother asking if you're not really interested?
如果你不是真的感兴趣,干吗费口舌打听呢？

fight back (against sb / sth)
奋力抵抗；还击:
Don't let them bully you. Fight back!
别让他们欺侮你。要还击！

be criss-crossed with
构成十字形(或交叉)图案:
The city is criss-crossed with canals.
这座城市里运河纵横交错。

confront sth
使…无法回避；降临于:
The government found itself confronted by massive opposition.
政府发现自己遭到了强烈的反对。

usher sth in
开创；开始；开启:
The change of management ushered in fresh ideas and policies.
更换领导班子带来了新思想和新政策。