No.of grade
[化] 代号
🧩 词语组成解析
🗣️ 情景例句
For example, did you know that 1 in 4 teenagers has tried marijuana?
比如，你是否知道4个青少年中就有1位曾经吸过大麻？
Let me see. Are dimes and quarters OK?
让我瞧瞧。1角和2角5分的硬币行吗？
for fear the agents of other firms should be able to trace the kind of research they are likely to be undertaking.
他们生怕别的公司的情报人员据此摸到他们可能要从事的某项科研项目。