strengthen
ˈstreŋθən verb
4
MONEY
to increase in value, or to increase the value of money 〔货币〕增值; 增加〔货币〕的价值; I,T
6
PROOF/REASON
证据/理由
to help prove something 为…提供更有力的理由 (证据) T
7
WIND/CURRENT
风/水流
to increase in force 加强,增大 I