Pentone
缬烯炔, 异戊烯炔
🗣️ 情景例句
Because the job was not challenging enough.
因为那份工作挑战性不够。
Has this seat number started boarding?
这个座位号已开始登机了吗？
for even though it was far too big for her needs, she persisted in living there long after her husband's death.
房子实在太大了，但在丈夫去世多年后，她仍然执意长年住在那儿。