foothold
/ˈfʊthəʊld/noun
1- a place where a person's foot can be lodged to support them securely, especially while climbing（尤指攀登时踩脚的）立足处。
1.1
- usu. in sing. figurative a secure position from which further progress may be made〈喻〉（进一步发展的）据点, 立足点：
the company is attempting to gain a foothold in the Russian market.
公司试图在俄罗斯市场站稳脚跟。