英语语法分析

Studies hae shown that angioplasty and stenting can sae lies when used in heart attacks.

许多研究已经证实，对突发心梗，血管成形术和支架植入可以挽救病人生命。

Studies have shown that angioplasty and stenting can save lives when used in heart attacks.

许多研究已经证实，对突发心梗，血管成形术和支架植入可以挽救病人生命。

Studies have shown that angioplasty and stenting can save lives when used during heart attacks.

研究指出在心脏病发作的时候冠脉成形和支架植入可以挽救生命。