to express yourself表达自己的思想；发表自己的观点
It's not easy to express yourself in a foreign language.用外语来表达自己的观点不容易。
He expresses himself easily in English.他轻松地用英语表达自己的观点。
Children may find it easier to express themselves in a letter than in a formal essay.孩子们或许会发现在信件里表达自己的观点要比在正式文章中简单。