我仍旧感到能力不足，毫无用处，混淆不清。

I still feel inadequate, useless and mixed up.

《柯林斯英汉双解大词典》

我毫无保留的向你推荐他，因为我相信你会欣赏他在研究上的非凡能力。

I recommend him without reservation, as I believe you will appreciate his exceptional ability in his studies.

youdao

保持这种能力毫无疑问是人生中最艰难的斗争之一，在此我有几条建议送给大家。

I have some practical advice for you in this struggle, which is one of the great battles of life.

youdao