bilateral
adj.
"having two sides," 1775, from bi- + lateral. Related: Bilaterally.
〔李〕[bi-=two 二；later=side 边；-al a.=of…的⇒“of two sides 两边的”→] a. binding both sides or parties 双边的，双方的
〔李〕[bi-;later;-ala.] a.两边的，双边的 ←later (L latus,lateris)=side 边
〔蒋〕[bi-双，later边] 双边的，两边的