船员似乎训练并不有素，碰到过明级的美军舰艇和潜艇对其并未留下深刻印象。

The crews appear to be poorly trained and American ships and subs that have encountered Mings have not been impressed with the Chinese boats.

youdao

在经济管理这一主要问题上，卡梅隆和其影子大臣乔治•奥斯波恩比布朗和未留下深刻印象、但名副其实的达林大臣占优势。

Mr Cameron and George Osborne, his shadow chancellor, lead Mr Brown and Alistair Darling, the underwhelming actual chancellor, on the key question of economic management.

youdao

All right, so here is a perhaps familiar if underwhelming formula.

好的，这里有一个可能常见的,但可能未留下深刻印象的公式。

哈佛公开课 - 计算机科学课程节选