浮皮蹭痒fú pí cèng yǎng

scratch the surface;superficial
❍ 我们的初步调查，只是～而已，很多工作有待我们去做。Our preliminary investigation is only superficial and a lot of work remains to be done.

• soil testing
• soissons
• sojourn
• soka gakkai(或value creation society)
• sokoto
• sol
• sola
• solace
• solanaceae
• solar
• solar cell
• solar constant
• solar enengy(或solar power)
• solar flare
• solar power
• solar prominences
• solar system
• solar time
• solar wind
• solatium
• solder
• soldier
• soldier beetle
• soldierfish
• sole