这两种水果里都含有苹果酸，苹果酸会软化牙釉质，腐蚀牙齿，所以用完以后一定要用清水漱口，同时制作这种糊状物的时候也要少用些小苏打。
As both contain fruit acids, that can soften enamel and cause decay, it's important to rinse with water after using, and limit the use of baking soda as in the instructions below.
我想包饺子，但发现面粉用完了，所以出去买了一些。
I wanted to make dumplings but found I had run out of flour, so I went out to buy some.
斯皮策的液态氦冷却剂在2009年5月用完了，所以这张假彩色图像来自在目前较温暖的操作温度下对红外光仍然敏感的两个波道。
Spitzer's liquid helium coolant ran out in May 2009, so this false color view is from two channels that still remain sensitive to infrared light at warmer operating temperatures.
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