但他也提醒，白宮的追蹤數據「包含可能最終不會實現的投資承諾」。他舉例說，歐盟的貿易協議就是一例，該協議因特朗普最新的關稅威脅而被擱置。
There are two main types of smoke alarm tech, says Raman Chagger, principal consultant at BRE, the Building Research Establishment. Ionisation-based systems use a tiny amount of radioactive material to charge, or ionise, particles in the air which flow between two small plates. Should smoke interrupt that flow of charged particles, the alarm goes off.
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