在许多情况下，母乳妈妈们可能会需要把奶挤出来。如要用到吸奶器，您可能会想了解一下哪种最适合自己。经过练习，几乎每种吸奶器都可以用，但不同的吸奶器在不同的情况下表现不尽相同。此外您或许也想学会用手挤奶，因为这在不少情况下会很有用。

If you've been in China long enough, you've probably noticed that special hand gestures are used to express the numbers from one to ten. Why is that? China has many different dialectsand sometimes it ...