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At the same time, methanogens can use hydrogen and carbon dioxide produced by other bacteria to generate methane,
同時，產甲烷菌可以使用其他細菌產出的氫和二氧化碳以生成甲烷，
which can reduce the total volume of gas by using up hydrogen and carbon dioxide.
通過耗掉氫氣和二氧化碳來減少氣體的總量。
So there's a complex web among intestinal bacteria
因此，腸道細菌形成了一個復雜的網絡，
allowing them to flourish by either directly consuming undigested food, or using what other bacteria produce.
它們可以直接消耗未消化的食物或者消耗其他細菌生產出來的東西。
This interaction largely determines the amount and type of gas produced,
這種相互作用在很大程度上決定了氣體所產生的量和類型，
so gas production is a sign that your gut bacteria are at work.
因此，產氣表明你的腸道細菌在起作用。
But in some instances, people may develop abnormal increased flatulence.
但是在某些情況下，人們可能會產生異常的胃腸脹氣。
A common example is lactose intolerance.
一個常見的例子是乳糖不耐癥。
Most individuals have the enzyme for breaking down lactose, a sugar present in milk and milk-derived products.
大多數人都有分解乳糖的酶，乳糖是一種在牛奶或奶制品里存在的糖。
But some people either lack it entirely, or have a reduced amount, such as after a gastrointestinal infection,
但是有些人可能就沒有這種酶，或者有但是數量不夠，如胃腸感染后，
so they're unable to digest lactose products and may experience cramping, along with increased flatulence due to bacterial fermentation.
所以他們無法消化乳糖的產品并可能腹部絞痛，同時伴隨著由于細菌發酵而導致的脹氣。
But remember, most gas is produced as a natural result of bacterial fermentation in the intestine,
但是記住，大部分氣體都是由腸胃里的細菌自然發酵的，
and indicates healthy functioning of the gut.
這表明腸胃正常工作。
The amount and type can vary based on your diet and the bacteria in your intestine.
氣體的數量和類型會因為你的飲食和腸道內的細菌種類而有所不同。
Exercise social courtesy while passing gas, and do try to forgive your bacteria.
放屁時也要嫻習禮儀并試著原諒你的細菌。
They're only trying to be helpful.
他們也只是想幫幫忙。
