双凸面

shuāng tū miàn

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Definitions

1. convex on both sides (of lens)
2. biconvex

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Child Words of 双凸面

• 凸 凸 tū: to stick out
• 双 双 shuāng: two
• 凸面 凸面 tū miàn: convex surface
• 面 面 miàn: face