Step 3: Use a pencil to make a hole into both sides of the tube.

第三步：用铅笔在试管的两边都戳一个洞。

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Please infuse with pencil powder into key-hole then running few times when door open is not flexible.

门锁开启不灵活时，请往钥匙孔内加入适量的铅笔芯粉末再往来转动几次即可。

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Last month the Washington University surgeons drilled a small burr hole, about the diameter of a pencil, into the patient's skull.

上个月华盛顿大学的外科医生用钻孔器在这个病人的头骨上钻了一个洞，直径大约和铅笔一样。

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