đi vào
////The origin of the phrase "go in" can be traced back to the early 17th century. At the time, the phrase was used as a command for taking part in combat or entering a battle. In military terminology, "go in" referred specifically to the moment when soldiers charged forward into enemy lines. Over time, the meaning of "go in" began to evolve. By the mid-19th century, the phrase was being used more generally to refer to entering a situation or activity, particularly one that may be risky or uncertain. This broader meaning still holds true today, with "go in" commonly used in a variety of contexts, from business and finance to sports and entertainment. Interestingly, the phrase "go in" has also been used as a slang term for engaging in sexual activity. This usage dates back to at least the 1920s, when it was commonly used in the context of dating and romance. Today, the phrase still has a sexual connotation in certain circles, particularly among younger speakers. Overall, the origin of "go in" as a military term serves as a testament to the influence of war language on everyday English, highlighting the role that military strategy and vocabulary can play in shaping its evolution over time.
to enter a room, house, etc.
vào phòng, vào nhà, v.v.
Chúng ta vào trong đi, trời lạnh rồi.
if the sun or moon goes in, it disappears behind a cloud
nếu mặt trời hoặc mặt trăng đi vào, nó sẽ biến mất sau một đám mây
