hand test

例句：

1. 1. The engineer conducteda hand test on the new machine toensure its reliability.
   工程师对新机器进行了手测试，以确保其可靠性。
2. 2. The scientistperformed a hand test on the sample todetermine its composition.
   科学家对样本进行了手测试，以确定其成分。
3. 3. During theconstruction phase, the team conducted several handtests to ensure the safety of the workers.
   在施工阶段，团队进行了几次手测试，以确保工人的安全。