No matter how tough it gets, we must stick it out.

无论多么困难，我们都要坚持到底。

Since we have to tough it out, why not get ourselves psyched up for victory?

既然我们一定要坚持到底，为什么不为成功作好心理准备呢？

Ask for help, don't abdicate responsibility or tough it out yourself: I learned this lesson very early on in my project management career.

寻求帮助，不要推卸责任，也不要委屈了自己：我在项目经理这个职位上很早就知道了这一点。