例句與造句

1. they say that in the spring, they hope to train a laser on the antihydrogen to make a preliminary measurement of the atom's spectrum so that it can be compared to regular hydrogen
   他們在春天說,他們希望產(chǎn)生一束反氫激光制造出原子光譜的初步測量器以便它能與常態(tài)的氫相比較。
2. It's difficult to find preliminary measurement in a sentence. 用preliminary measurement造句挺難的