例句與造句

1. Oxygen is a weaker oxidant and inherently more likely to form covalent bonds, but it only forms molecules with six metals ( manganese heptoxide, technetium heptoxide, ruthenium tetroxide, osmium tetroxide, plutonium tetroxide, and iridium tetroxide ).
2. It's difficult to find technetium heptoxide in a sentence. 用technetium heptoxide造句挺難的