With concern
关切地, 放心不下地
🧩 词语组成解析
with
[wɪð]
prep. 和，跟;随着;关于;和…一致;
🗣️ 情景例句
I found it.
我发现了它。
The wire has got crossed.
电话串线了。
Ethanol is more effective at a concentration of 50-70 percent;
乙醇的浓度为50％至70％时比较有效，