with obj.
- subject to an excessive demand on strength, resources, or abilities使过度紧张; 用…过度：
there was a risk he might overstrain his heart.
他有使其心脏不堪重负的危险。
mass noun
- the action or result of subjecting someone or something to such a demand过分紧张; 过分的用劲：
overstrain had brought on tuberculosis.
工作过度引起肺结核。