1. 露西擅长山水画，偶尔也画画油画。
Lucy is skillful at painting landscape and does occasional oil paintings.
Lucy is especially good at traditional Chinese landscape painting, but occasionally she does oils too.
Though an expert on traditional Chinese landscape painting, Lucy does occasional oil paintings too.
2. 学习是一场持久战，我们应该避免持续性坐吃等死，间接性踌躇满志的情况。
I believe studying whatever you want is an ongoing process, and don't just occasionally have plans.
