The front and the back of words "là" are the two members that are talking the same contents. The first word "là" like that taxi driver say to customer: "Hai phút là tới nơi !" But that sentence have word "Nếu" So The second word "là" is like word "thì" in the sentence "Nếu cậu ốm ra đấy thì ai làm thay được cậu bây giờ" ="Nếu trời nắng "là" có thể phơi quần áo ra ngoài." = structure "nếu A thì B" = structure "nhỡ A thì B" Quote from intermediate vietnamese use for foreigners: "Structure (Nhỡ A thì B) used to express a condition thay can be happen. A and B can be a verb, an adjective or a clause" ⊙﹏⊙ Sorry my english is not very well. Hope you understand ! #^_^#

Two words "là" in this sentence can be understood in different meanings. - The first "là" is a conjunction that link "chỉ cần đi một phút" with "đến được nước Pháp". People use "là" in this case to revert position of two phrases in Vietnamese. People often use "Nếu đến được nước pháp mà chỉ cần đi trong một phút". But when people want to stress the phrase "chỉ cần đi một phút" by moving this phrase to the beginning of sentence, they use "là" to link 2 phrases together. You can understand the first clause in English such as "If you can arrive in France within 1 minute" - The second "là" is a conjunction that link 2 clauses together. It's same meaning with "thì" in Vietnamese sentences' structure "Nếu ... thì ..."

They are the structural words. They show the meaning "the things are setting out are the contents of what has just been said"