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【怎樣去除床單上的血漬血漬時(shí)間長了如何洗小妙招】how to remove dried/ stubborn/ ingrained blood stains?

stubborn就是頑固的意思， ingrained根深蒂固的，大意就是比較難處理的。
新鮮的血漬立馬用冷水沖洗，然后用肥皂或者洗衣液揉搓. Don't use hot water, otherwise the stains will set in the fabric. 如果用熱水的話，血漬就會牢牢地扒在衣服上面，反而不容易沖洗掉。
那么如何處理那種干了的血漬呢？用雙氧水處理。
首先用冷水浸泡一夜，然后在有血漬的地方涂上雙氧水，靜置五分鐘，然后揉搓沖洗，這個(gè)動作反復(fù)重復(fù)幾次，直至血漬消失。然后正常放在洗衣機(jī)里清洗即可。
The most effective method is to use hydrogen peroxide, an oxidizing agent that removes old blood stains via a chemical reaction that breaks down the discolouration. While it’s safe to use, hydrogen peroxide can cause discolouration to some fabrics and can irritate skin, so always wear gloves, test on a hidden area first and check the care label to make sure it’s suitable.
詞匯講解：
雙氧水的化學(xué)式 H?O? ， hydrogen 氫就是H 。oxide 氧化物： "compound of oxygen with another element.
peroxide: per (large amount 很多) + oxide (oxygen氧) 。過氧化氫就是hyddrogen peroxide. 氧化劑就是oxidizing agent.
discoloration 褪色= dis (off, away 去掉)+ color (顏色)+tion (構(gòu)成名詞的后綴)
How to get dried blood out of clothes and sheets

Remove any solid deposits using a blunt knife or spoon.
Apply a small amount of hydrogen peroxide directly onto the stain.
Leave it for five minutes and then blot with a paper towel.
Rub gently with a clean, damp cloth until the stain is gone.
Rinse the area with cold water until all the hydrogen peroxide has rinsed out.

廚房里面用小蘇打或者醋也能很好地去除污漬。
Can vinegar remove blood stains?
If you can get to the stain before it sets, remove blood stains by pouring full-strength white vinegar on the spot. Let it soak in for 5 to 10 minutes, then blot well with a cloth or towel. Repeat if necessary, then wash immediately.
blot是擦拭的意思，重點(diǎn)在吸。
A baking soda paste (two parts baking soda to 1 part water) is also a good trick to help lift blood stains. Apply the poultice directly to the stain and leave it for up to 30 minutes. After you've removed the paste, carefully blot the area with a damp cloth or paper towel then wash as normal.