The Apple iPhone and iPod Touch are the tip of this spear.
苹果公司的iPhone和苹果触摸（ipod touch）就是敲门砖。
Thermocouple tip must touch the end of the thermowell.
热电偶头必须碰到热电偶套管的顶部。
Here is another tip: Don't touch the tip with the tips of your fingers.
还有一条提示：别用手指尖摸小费。
Do not touch dropper tip to the eye, eyelid or to any other object.
不要触摸滴管尖端的眼睛，眼睑或任何其他对象。
Do not touch dropper tip to the eye, eyelid or to any other object.
不要触摸滴管尖端的眼睛，眼睑或任何其他对象。
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