水源: water source, water supply, headwaters of a river...
联欢: to have a get-together, celebration, party...
溶解: to dissolve...
厂商: manufacturer, producer...
虎: tiger...
放: to release, to free, to let go, to put, to place, to let out...
也许: perhaps, maybe...
除非: only if (..., or otherwise,...), only when, only in the case that, unless...
集会: thorny (problem), intractable...
内幕: inside story, non-public information, behind the scenes, internal...
