填空题 Amber（琥珀） formation and use / resin （树脂）

填空题 amber produces resin to protect itself against 1 and fungi（琥珀形成原因：有虫灾、虫害才有琥珀）

填空题 Some resin has colors because it was formed from 1 and mineral in soil.

填空题 The conditions to form amber include pressure, 1 and time.

填空题 The mid-product copal was formed during? 1 stage

填空题 It is often formed in the 1 .

填空题 The ancient Greek believes that water and air found in the ammber was trapped 1 .

填空题 Here is a special one in every 1 .

填空题 It can be used to make jeweler, necklace, but should be set in 1 settings.

填空题 When it was mingle with powder and 1 , the medicine can prevent the disease such a plague.

填空题 It can be also used as 1 .