being in a leading or important position in a field
处于某个领域的领先或重要位置 (chùyú mǒu gè lǐngyù de lǐngxiān huò zhòngyào wèizhì)
"The research center is at the forefront of renewable energy studies."
"研究中心在可再生能源研究的最前沿。" (Yánjiū zhōngxīn zài kě zàishēng néngyuán yánjiū de **zuì qiánxián**.)
At the right or appropriate time.
The process of improving the visibility of a website or web...
to provide full and exact details about something
to achieve success very quickly
Adapt to the customs of the place you are visiting
to start something from the very beginning
