perfect
to make something as good as you are able to
例句: Jiro Ono, arguably the best living Japanese sushi chef, has devoted his entire life to perfecting the art of sushi.
1）翻譯下面的句子：
他是在德國讀本科期間提高了自己的德語能力穿肄。
He perfected his German during his undergraduate years in Germany.
參考翻譯：It was during his undergraduate years in Germany that he perfected his German.
2）場景：他一有機會就在提高自己的口語能力陕截。
造句：He has taken every opportunity to perfect his speaking skill.
