从船模试验的结果看来，这种改进措施都能收到一定成效。
The result of model experiments shows that such measures are effective.
乾隆帝为挽救“国语骑射”而进行的种种努力仅收到一定成效。
Efforts made by Emperor Qianlong to save them had no practical result.
采用人工扩挖旁洞、钢拱架支撑和超前导洞等工程处理措施收到一定成效。
Actual measures as manual excavation outside of the shield, steel frame supporting and advanced adit for prediction were adopted.
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