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The portuguese verbs 'ser' and 'estar' both translate into the english verb 'to be'. However, the two are not interchangeable. 

'Ser' is...

In truth, there is no fixed way to structure a personal statement. What a personal statement should do is demonstrate each of the following: a love of the subject you intend to study at university; goo...

The lungs are made up of tiny sacs called alveoli which presents a very large surface area for gaseous exchange. The lungs are well supplied with blood due to lots of capillaries covering the alveoli, ...

Prepositions that trigger the dative case in German are mit, nach, seit, von, zu, aus, außer, and gegenüber.

Organisms, such as humans, take in "substrates" such as glucose, in our food.  During a process called respiration, we react these substrates with oxygen to give carbon dioxide and water; thi...