他确信他会成功
He is convinced that he will succeed
以上为机器翻译结果，长、整句建议使用 人工翻译 。
他确信他会成功。
He is sure of his success.
youdao
由于确信他的调频收音机不会成功，1954年，阿姆斯特朗从他位于13层的房间纵身跃下。
Determined that FM radio would never succeed, Armstrong jumped from the 13th floor of his apartment in 1954.
他确信他的计划会成功。
He is sure that his plan will work.
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