This poem is about the art of losing. The speaker said that the art of losing isn・t hard to master. While I don・t think the speaker really means to it. Otherwise it is not art and we don・t need to learn to master.
In the first stanza, I guess the missing word could be ：irritant； and the first sentence should be ： so many things filled with the irritant seem to be lost that their loss is no disaster.； Here, the speaker starts ：losing； something people don・t like so to lose is not difficult. Then she loses something more and more important, even farther and faster. Although the speaker keeps emphasizing that mastering the losing art is no big deal, we readers deeply feel sad by degree. Isn・t it still hard to master? No. I think we should contrast these things. Compare to the names, are door keys important? Compare to our loved houses, places and where you・ve not traveled don・t seem to be important. In this way, what is important? What is worthy to feel say fi we lose it? Losing everything could be tough and also could be easy to master. We have to accept it no matter how tough it is. When you keep losing more and more important things, the fact of being could be light. I think the tone of the speaker is ironic and a little joking. She does feel that mastering the art of losing is hard to master. I think she is finding the feeling of belonging. Names, places and houses are kind of labels for human being in this society. Names and homeland mark us. I think cities, realms, rivers and a continent refer to her growing places. Her parents passed away early and she・s moved from places to places in her childhood. Therefore I think this poem is about losing familiarity of hometown. Maybe the scene and objects didn・t change but the people and the feeling did change. Somehow she must accept it. In the last stanza, even losing the lover the speaker still wants to get used to the hurt feelings. I think she wants to be strong but in fact it is not easy at all. The joking voice and the gesture are the concrete image of her lover. I think the parenthetical ：Write it!； and the repeated ： like； mean that she wants to force herself to get through. I also think ： like； is a kind of sigh. The tone is like an older people teach a lesson to younger ones.
This poem is well-organized. Except the last stanza, every stanza consists of three lines and the meaning and sentence of the last line are almost the same. The variation of the rhymes is regular. I think that is because we always keep losing things. Whatever we lose, we all need to get through.