I feel constrained to write and ask for your forgiveness.

我不得不写信请你原谅。

I felt constrained to do what I was unwilling to do myself.

我觉得是被迫去做我自己不愿去做事情。

Calypso in her caves constrained his stay.

她洞穴中卡吕普索强迫他留下。

Cold weather constrained the plant's growth.

寒冷天气抑制了植物生长。

After five minutes of irksome and constrained conversation, they heard the sound of slippered feet approaching rapidly.

经过五分钟阴郁虚话之后可以听见飞快走来步履声。

Not be constrained on textbook, if you have thorough research to thingamy, can consider to study achievement serves as achievement.

不是拘泥于课本上，如果你对某东西有深入研究，可以考虑研究成果作为成绩。