He treats this substance with the acid more carefully than before.
他比以前更小心地用酸来处理这种物质。
The body then can store this substance.
人体能储存这种物质。
Nobody knew the composition of this substance before now.
以前没有人知道该物质的组成。
Account should be taken of the low melting point of this substance.
应该考虑到这种物质的熔点低。
This substance has an affinity for water.
这物质和水有亲和力。
This substance takes fire easily.
这种东西容易着火。
This substance is soluble in alcohol.
这种物质能够溶解在酒精中。
This substance should not come into contact with food.
这种物质切莫与食物接触。
This substance should not come into contact with food.
这种物质切莫与食物接触。
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